Reflective DLL Injection update, bugfix and tidy

* Pulled source from Stephen Fewer which contains a few updates including
  support for Windows RT.
* Added Stephen Fewer's fix which includes a correct pointer size for the
  reflective DLL loader function.
* Added ENABLE_STOPAGING to allow toggling of VirtualLock() call (defined
  by default).
* Added ENABLE_OUTPUTDEBUG to allow toggling of calls to pOutputDebug
  (undefined by default).
* Remove more warnings in some areas of the code.