SHOW INFO now prints path to config
Review Dmitry's patch, fix tests.

Incorporate spelling/grammar mistakes identified during
a review of the user guide, done by courtesy of Peter Gulutzan.

Start extending the manual with Lua stored programs.

Update ER_NO_SUCH_PROC, if the procedure doesn't exist,
quote the procedure name, since it can be empty.

A fix and a test case for
https://bugs.launchpad.net/tarantool/+bug/750658

--background neither closes nor redirects stdin/stdout/stderr

--background option didn't work properly, since stdin/stdout/
stderr streams were left open and pointing to a terminal.

This lead to a hang when tarantool was started from a
shell script or over ssh.

If --background option is given, we need to fork,
try to create a pid file, close stdin/stdout/stderr
and then initialize the logging
subsystem.

Remove the restriction on type of primary key index.

Fix a compilation error.

https://blueprints.launchpad.net/tarantool/+spec/namespace-to-space

Rename 'namespace' to 'space' everywhere:
in configuration, in implementation, in documentation.

https://bugs.launchpad.net/tarantool/+bug/730613

Document Bug#730613, "SELECT with a disjunction
on multiple keys returns matching tuples twice".

Now that confetti supports it, use boolean for true/false
yes/no config options.
Update the manual accordingly.

Fix a bug when Lua transaction was rolled back
twice when Lua procedure was invoked from CALL.

Change the way arguments to and from CALL
statement in the binary protocol are passed:
we used to pass everything from the wire as a single
binary blob. Now every field of the received
tuple is passed in as a separate string argument.

Everything passed back from Lua is converted to a tuple. This
makes CALL response similar to one of SELECT.

Improve box.pack() to convert its argument to integer when
necessary. Add an argument count check to box.pack().
Additionally, now box.pack() can be used to pack
operations of 'UPDATE'.

Use tarantool_lua_tostring() in iov_add_ret():
this function is now used to convert return values to
the binary protocol in box_lua.m. This is necessary
if we try to send boolean or nil over the
binary wire, since Lua C API lua_tostring()
does not convert them.

Add box.lua - a system Lua script
compiled into Tarantool and containing a bunch
of Lua code preloaded at startup.

Populate box.lua with implementation
of basic Lua functions:
box.select(), box.update(), box.replace(),
box.insert() (currently an alias for box.replace()),
box.delete(). They are all wrappers around box.process().

Move box_lua_init() to the beginning of mod_init(),
since Lua in future can be used in recover().

Fix a wrong assumption about the contents
of Lua stack in iov_add_multret().

Update sql.g Python SQL grammar to allow
an empty argumeent list for procedure in CALL
statement.

Add initial documentation on Lua procedures.

Add more Lua tests.

Unrelated: rename INSERT to REPLACE, and UPDATE_FIELDS to
UPDATE.
Remove SELECT_LIMIT, which is not used any more.

CALL accepts flags and a tuple (list of fields).

Add CALL support to the sql.g parser (Python
testing environment).

Add two new error codes: ER_PROC_LUA (an
error inside Lua procedure) and ER_NO_SUCH_PROC.

Since so far there is no way to create a stored
procedure (one needs to rebuild Tarantool to pre-load it),
this addition has little practical use.

Implement rudimentary Lua support in the administrative console.
Remove exec module command, it's not used and we now
have Lua for similar purposes.

Add a first Lua module, "box", which
has only one function -- "pack", and test it.
'pack' is derived from box.tbuf module in the
original Lua patch.

Fix a bug in box-protocol.txt, tuple format
description.

Add a copyright header to include/errcode.h (unrelated).

Implement a prototype for Lua initialization
procedure: there is a function tarantool_lua_init(),
which any code, core or modules, can call.
tarantool_lua_init() calls mod_lua_init() to
add module-specific Lua extentions.

Fix a bug in mod/CMakeLists.txt, generate_admin_c
CMake target didn't exist, so admin.m wasn't
re-generated correctly when admin.rl was changed.

In DELETE, support flag BOX_RETURN_TUPLE.

A community request from Alexandre Kalendarev.

In the new DELETE (21) command, one can specify
delete flags. If BOX_RETURN_TUPLE is set, return
the old (deleted) tuple to the client.

Update doc/box-protocol.txt to reflect the new
(21) DELETE and its extended response format.

Update the user guide with new links to configuration file,
and changes to replication configuration parameters, now that
feeder-in-core has been pushed.

Add lua generated files to .gitignore

PEP8 coding-style for Python code was added. Python code ndentation
was changed to PEP8 format.

Send error messages to the client.

Before this patch, Tarantool would only send an error
code to the client, but record all the details in its error log.

This patch extends the client/server protocol and adds
error text to it. This text can now contain not only
a staple message that corresponds to the error, but
problem-related additional information, such as namespace id,
field number, etc.

All errors still can be logged in the error log, but
not all of them need to be. For errors, which are only
sent to the client, this patch uses ClientError exception
class. Errors which also need to be logged in the error log
must use LoggedError exception class.

To choose between the two, the following rule of thumb is applied:
- client application errors, which, generally, can be non-errors at all,
  such as access to a non-existing namespace, index or field, or
  access to a locked tuple are not logged
- execution and protocol errors, such as an error writing to disk,
an message that doesn't follow the protocol format, is logged.

For the most common error, ER_TUPLE_IS_RO, we do not use
string template to reduce CPU cycles necessary to produce this error
(on my machine one can raise ~200 000 exceptions per second, which is not
too much).

An addition to the above, this patch renames error codes, to
make them shorter (ERR_CODE_* -> ER_*) and rewrites the iproto.m
client connection loop to make it a trifle more efficient.

This patch also fixes a couple of bugs:
- in exception.m, [tnt_Exception alloc]
when we reused the old exception class, we did
not reset its 'isa' pointer, which could lead to a crash
when a message with a different signature was sent to
it.

- in box_dispatch (renamed from box_dispach),
when logging for slow commands was done, txn->op could
already be overwritten by txn_commit()/txn_abort().

A comment on the naming scheme: prefixing every Tarantool
piece of method/data structure with tnt_ would lead
to very bloated code. So in this patch
I decided to reduce the use this
prefix to the client library code and some very
generic names only.

Tweak my previous patch for proctitle to be a bit
more robust to the path length.

Start pruning Tarantool wiki on github, and add documentation
on Tarantool process title to the user guide, since
it is present on the wiki but not in the user guide.

While at it, make the process title more lookalike on Linux
and FreeBSD, and rename some of the (what looks to me as) unclear
process titles.
The documentation reflects the new naming scheme already.

Move Ruby connector to its new destination (connector/).

Extend language-reference.xml.
Minor edits of salloc.m.