Created RNGManager class. (Compile errors exists related to luabind)

Class is pretty much done, but untested due to compiler errors.

Luabind is giving wierd compile errors saying that _class is not defined in luabind namespace. Furthermore i'm not sure how to pass overloaded functions to luabind without using C casts (which are compile errors with -werror flag)

if someon (Nimbal) can take a look at my code (first and foremost luabind) that would be great!