Build: add /W4 and /MP options on MSVC
Use Lua 5.2 debug libraries for debug when available.
Avoid warnings.
object_rep: Don't implement disabled functions.
FindLuabind: Look for libraries with version suffix first.
FindLuabind: Display include directory in "Found Luabind: ..." message.

Previously, the libraries were displayed which looked quite ugly, since it is
a rather long string which overflowed the console's line length.