Fixes an overloaded virtual function warning
Fixes an overloaded virtual function warning

Thanks Pixelballoon.
Fix warnings.

Thanks Pixelballoon.
Fix Windows warnings and errors.
* wchar to char.
* double/float cast.
* va_args.
* namespace.
Fix Windows OpenGL linking
* Added missing FreeImage.dll. Updated lib. Updated to Freelmage 3.15.4.
* Altered .gitignore to not ignore bin directories.
Fix signed/unsigned.
* No warnings or errors in GWEN Windows OpenGL debugfont sample now.