Merge pull request #103 from dariomanesku/master

Added imguiColorWheel + fixed scrollbar.
Merge pull request #104 from dariomanesku/master

Added imguiColorWheel to 18-ibl.
Merge pull request #105 from dariomanesku/master

Added setViewRect inside nanovg.
Cleanup.
Merge branch 'master' of github.com:bkaradzic/bgfx