Many major changes

- Updated GTKSharp OpenGL Widget (GLWidget) to version 1.1
- Added "SkyBox" support (with own lightening)
- SkyBox resources (bitmaps) added
- Added Mouse support (looking around (and zoom) with right mouse button
pressed supported)
- Util, TextManager, SkyBox, Mouse classes added
- All animations independent of frame rate (frameDelta variable used)
- Camera's FieldOfView, Eye, Target and Up vectors introduced - used for
Projection matrix and Modelview matrix operations
- RenderScene() now supports Projection matrix and Modelview matrix
change
Spaces between FileSlice boxes are now definable

Spaces between FileSlice boxes are now definable
.gitignore file updated

.gitignore file updated