Added placeholders to version control table as well as a "save version" button.
Brush Size preview is mostly working. Need to center it and get it to disappear when editing ceases for the brush slider.
Brushes now are drawn relatively centered, finishing editing the brush size now dismisses the brush size preview correctly.
Merge branch 'master' of https://github.com/benpious/shareslate

Conflicts:
	ShareSlate.xcodeproj/project.pbxproj