Added MacOS versions of FreeImage.NET

Added a universal Assembly which uses non unicode api
calls when loading files. This should work on all platforms
as the unicode versions only worked on windows.

The libfreeimage.dylib files were sourced from brew and
are universal binaries and as such will work on both
x64 and x86 system.
Fixed the Diff so its the right way round
Add SharpDX Windows Phone 8.1 Binaries
Merge pull request #30 from aljim/master

Add SharpDX Windows Phone 8.1 Binaries
Merge pull request #29 from dellis1972/master

Added MacOS versions of FreeImage.NET
[assimp] Implemented MAcOS support for AssimpNet

Also upgraded the libassimp.dylib to be a
universal binary.
Fixed up AssimpNet to look in the executing assembly directory
for the libassimp.dylib. Gets rounds an issue when executing
MGBC.exe on mac.
Merge pull request #31 from dellis1972/master

[assimp] Implemented MacOS support for AssimpNet