Complete the default skin with a layout for some missing controls, mostly GroupBox and other items on that list (visual comes from a previous release of GWEN)
Fix the textbox Layout issue (No centering) and unintuitive selection/scrolling behavior.
Add DirectX SDK include /bin dir to the premake files so that it compile out of the box.
Merge pull request #36 from jeremieroy/master

Fix the textbox layout behavior, add DXSDKDIR to premake and restore default skin