A fix and a test case for

https://bugs.launchpad.net/tarantool/+bug/729758
"SELECT fails with a disjunct and small LIMIT"

and

https://bugs.launchpad.net/tarantool/+bug/729879
"Zero limit is treated the same as no limit"

These were simple coding bugs in SELECT main loop.

Conflicts:
	test/lib/test_suite.py

Allow disjunctions in SELECT WHERE clause and LIMIT
clause in SELECT, to be able to cover the problem
reported in Bug#729758.

Fix a bug with prepare_gdb arguments (remove an extra
space in -e option).

Add a simple test for Bug#729758.

The following bugs were reported in the process:

Bug#729789 "Zero limit is treated the same as no limit"
Bug#730593 "Bad data if incomplete tuple"
Bug#730613 "SELECT with a disjunction on multiple keys returns
matching tuples twice"

We don't have to reset struct sigaction
before every call to sigaction().

Use memset() to zero-initialize sigaction,
since there can be platform-specific memebers.

Conflicts:
	core/tarantool.c

A fix and a test casee for
http://bugs.launchpad.net/bugs/727174
"tarantool_silverbox crashes when saving snapshot on SIGUSR1"

Initialize the event loop before registering a child wait
callback.
Make we don't use fiber infrastructure in the signal handler,
which has its own stack.

@todo: Deal with this:

/build/buildd/binutils-2.20.1/builddir-single/bfd/../../bfd/plugin.c:127:
warning: Using 'dlopen' in statically linked applications requires
at runtime the shared libraries from the glibc version used for
linking
libltbox.a(tarantool.c.o): In function `main':
/home/kostja/work/tarantool/core/tarantool.c:453: warning: Using
'getpwnam' in statically linked applications requires at runtime
the shared libraries from the glibc version used for linking

"entering event loop" is printed into tarantool log
before we have successfully bound the TCP ports.
Expect for a correct message when trying to find
out whether or not the server has successfully started.

 - Replace strndrupa with alloca + memcpy.
 - In create_pid function do rewind before read from pid file.

A fix and a test case for Bug#726778 "Gopt broke wal_dir and
snap_dir: they are no longer relative to work_dir".

Ensure that snap_dir and xlog_dir can be relative to
work_dir.
Ensure that chdir happens before we handle --init-storage.
Do not mix declarations and definitions for recovery_state.
Add a test case to args.test.

Implement a number of simple fixes to compile on FreeBSD:
- work correctly with a GCC version that doesn't have
  -Wno-unused-result
- compile even if not GNU libc
- tee doesn't have '--append' option on FreeBSD, use
  the short version ('-a').
- fix a typo in log_io.c, ENOENT, not ENONET.

Implement
https://blueprints.launchpad.net/tarantool/+spec/consistent-header-guards

Audit all header files in tarantool code base for consistent use
of header guards:
- consistent naming scheme, following doc/coding-style.txt
- header guard goes before the copyright
- each header is self-sufficient.
- add copyright headers where they were missing.

Remove __packed__, __unused__, __noinline__ and __regparm2__ from util.h,
since the name __unused__ conflicted with a parameter name in
third_party/valgrind/valrgind.h, which led to a dependency in inclusion
order between util.h and this header. The define names were not standard, I
couldn't come up with some meaningful and standard names, and they were only
saving some typing, while not providing any extra functionality.

Rename 'silverbox' to 'box', across the board.
Delete the remnants of the old build system
(scripts/rules.mk and scripts/config-def.mk).

Do not touch client/perl for now, since it's maintained
elsewhere.

Return a non-zero exit status if there are test
failures, even if run with --force. This necessary to
correctly identify a test failure in buildbot run.

Make 'make test' goal operational on hosts with old
python or python somewhere else than /usr/bin.

Correct a regexp pattern in test suppression filter
to work in a more modern version of python.
In the new python \S matches '"', and the test
output is different compared to the recorded one.

Adjust regexp pattern in one of the tests that
started to fail after an increment in version number.

Start the next development milestone.

Add the simplest CPack configuration for
'make package' and 'make package_source'
targets.
Add an empty snapshot to revision control
to use in 'make package' and thus
spare the user from the need to do
--init-storage.
Modify args.test to accept a bare
(no git version) version number, and thus
ensure the user from a yet another call before
he/she can start work/play around.

"qsort implementation fails to sort arrays greater 4GB"

Bug#712447 "Valgrind reports use of not initialized memory
after 'reload configuration'

Bug#695689 "'save snapshot' does not report error when it occurs"

Bug#686411 "Possible data loss when renaming a snapshot"

Document the coding style in use. Quote Linux Kernel
coding style as the basis. Add Tarantool-specific
extensions.

Add a pre-recorded snapshot to the test coverage,
one that contains 500 records. Verify that we can start
from it.

Rename a test file to avoid shell escapes, align
a comment, modify ./test-run defaults to follow
the new build layout.

Generalize CMake build scripts to be able to
easily add new modules (such as box or feeder).
Move prscfg.{h,c} (confetti general library and
header) from third_party/confetti/ to cfg/ to
simplify the build.
Update configuration file templates and parsing
code to use the new confetti.
Rename cfg/tarantool_cfg.h to cfg/warning.h,
to be able to reuse it in warning.c.
Update tests.

Note: tarantool_feeder is now built in mod/feeder;
tarantool_silverbox is built in mod/silverbox.
Modify .gitignore accordingly.