luajit executable bug fix
as suggested by Niklas
binding moved to lua in root dir
cmake list files updated
environment updated for new bindings
cmake file implemented that builds libcrown-lua
LuaStack implemented
next_vec2 return a pointer
lightweight userdata methods implemented
Vec2 binding implemented
LuaEnvironmente provides funcionality for loading modules for crown-lua
LuaStack moved to lua dir
Vec2 binding done, others updated or deleted