MinGW can now be used with Visual Studio

Added CMake option to use MinGW Compiler instead of MSVC when Visual
Studio Generator was selected
Merge pull request #22 from JanBTG/master

MinGW can now be used with Visual Studio
Complete Scenegraph Overhaul

Cleaned up the comments, now everything in .h-files
Added a camera-class, just for test cases, non final
Added a Buffer.h Class, deleted the buffer.hpp class, but everything
works fine, i tested everything!!
Now the Scenegraph can be rendered directly in the while loop
Bug fixing 1.0

fixed bug in fbo test
Merge pull request #24 from MarcelBock/MarcelMaster

Scenegraph overhaul
input
Input #2
fix include
NOW Fix include
fix
Merge pull request #26 from MadeleineKolb/OwnBranch

Input
added shader
bugfix
more uniform support
more buffer
some changers
changes
Merge pull request #28 from KMichalski/master

fbo
Some Tests
Phong Shader added