Edited pro file for the Windows Explorer Plugin, added configurations for MSVC
Edited CatchCopy.def, removed ordinal values (unneeded?!) and added "PRIVATE" (required for those symbols)
Added two 64bit checks, not necessarily needed
Merge pull request #2 from blizzard4591/master

Refactored parts of the code for building native with Microsoft Visual Studio 2012, remaing working on modern Mingw