* SIGUSR2 handler sends SIGHUP to logger
  (default extra/logger could already handle SIGHUP).
* Add some options to cmd-line (to override config's options).

CMAKE_LOCALSTATE_DIR options added. Configuration file search path is changed to
${CMAKE_SYSCONF_DIR}/tarantool.cfg.

path changed

64-bit fields support was added.
The call test was updated.

Error test from server's responce was added to exceptions.

The function raise_exception was deleted, for exception the function
zend_throw_exception_ex is using.
Now send/recv functions is a part of I/O buffer interface.
Functions read_*_io_buf was moved to io_buf_*.

A fix and a test case for Bug#901674
"No way to inspect exceptions from Box in Lua"

Implenent pcall which works correctly with Objective C
exceptions.

initial implementarion of new php driver.