Conflicts:
	test/box/configuration.test

Conflicts:
	src/admin.cc
	src/admin.rl
	src/box/txn.cc
	src/lua/init.cc
	src/memcached.cc
	src/session.cc

Remove get_socket_addr(), use existing sockaddr_in
to save in the cookie.

Fixes gh-47.

Update test results to be more deterministic.

Conflicts:
	src/box/space.cc
	src/box/tuple.cc
	test/wal/oom.result

Tuples are got a big bigger with shared-arena patch (4 bytes
per tuple overhead).

So we exhaust the current arena in out-of-memory test a bit
faster than before.

Add comments, update the manual.

On snapshot, increase snapshot version id (u32),
save current snapshot version within a tuple.

On tuple free, check if tuple version is equal to current
snapshot id, if so do direct free, otherwise append tuple
to the delayed free list.

Fixes gh-45.

Conflicts:
	src/recovery.cc

Conflicts:
	test/box/lua.result
	test/box/lua.test
	test/lib/sql_ast.py

Fix https://github.com/tarantool/tarantool/issues/44