Shared library building.
Using shared library to run.
Fixed bug with freeing stack-allocated PlayerControl (in ~ControllerFactory).
Fixed Makefile target for running game.
Versions for library.
Library install target for Makefile.
Running game without any ld-path hacks.
Installing include headers in libinstall target.
Fixed GCC_VERSION macro and decltype ugly hack (fixed ugly hack, eh). Renamed engine directory.
Fixed customization includes (regarding system-wide chthon/ directory).