Fix a few bugs related to destruction of resources allocated in a
non-main thread.

Remove replication_prefork() and all the code related to pushing
a socket into another process.
Add debug asserts to slab cache, to ensure it's used from a single
thread only.

libcore is a thick a thick bundle with almost everything.
Rename it to libserver.

Extract the minimal server core with fibers & exceptions into libcore.

Add a prototype unit test for fibers.

Introduce a structure to represent a thread with an event
loop in it.

Do not require a working event loop in say() or wal_opt_sync().

Move towards a uniform include scheme where header files are
stored along with the sources files, in the same directory.

We had to begin to use this scheme thanks to use of subprojects,
and a mix of two approaches turns the code base into a mess.

Rename tarantool_pthread.h to tt_pthread.h

This is a pre-requisite for addition of Perl stored procedures.

Now that the network layer is exception aware, slowly
transit with the rest of Tarantool subsistems to
exception-based error handling model.

Make sure fiber_create() throws an exception
if there is insufficient memory for fiber or its
stack. Make the rest of the code aware of the change.

End the copyright madness. Tarantool authors maintain a shared
copyright on the code base. Remove individual copyright (c) from
specific files and put a single AUTHORS file in the project top.

Port tarantool to ObjectiveC.
Implement basic TNTException class and
 TNTFiberException and TNTBoxException subclasses.
Replace longjmp/setjmp with ObjectiveC exceptions.

mod/box: Restructurize request processing in the following way:

	try
		begin
		dispatch
		commit
	catch
		abort

where any error during request processing generate an exception.

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.

Make a system specific check for MAP_ANONYMOUS
part of configuration process.
Follow up on a broken ENABLE_BACKTRACE switch
and fix a few cases which didn't compile with it.

Use CMake to:
- Compile tarantool_silverbox, tarantool_feeder.
- enable ./test-run testing out-of-source
- implement Debug/Release configurations
- add ENABLE_BACKTRACE ENABLE_TRACE and HAVE_BFD switches
- support auto-generated targets