Fix OPENTAR-53: "Tarantool ignores kill -15 on startup"
opentar53-sigterm: review fixes

Add constants for signal count. Rename. Coding style.
opentar53-sigterm: remove pid file on SIGTERM during the boot process
opentar53: review fixes

Set signal handler for all signals, not just SIGTERM.
Print signal name to the log on exit.
Merge branch 'opentar53-sigterm' into stable
Change LuaJIT git url and update to the latest 2.0.2
Fix find path mysql libs
Fix #68: 'package' module should be disable in the sandbox
Russian documentation
Merge branch 'stable' of github.com:tarantool/tarantool into httpd

Conflicts:
	.gitmodules
Merge branch 'httpd' of github.com:tarantool/tarantool into httpd