GridCtrl: Fixed syncing control values in SetValues method (thanks Koldo!)
Fixed scrollbars look (added empty box between them like in ArrayCtrl)
GridCtrl: Small fixes to inserting and removing columns (incorrect elements where removed from internal tables)
GridCtrl: Added InsertColumn, fixed displaying joined cells after inserting row or column
CoreGl: Added support for geometry shaders and attributes. Moved fbo implementation to separate file
CoreGl: Fixed checking program linking status
CoreGl: Removed requirement for alpha in Color in order to compile without errors
WinGl, LinuxGl: Removed Font directory