Update issue #65 , issue #99 : Added menu and keyboard shortcuts for graph spacing
Swapped Refresh and Progress View. Refresh is now F5 matching other apps.
Changed control-wheel orientation to match other apps
Added some keyboard shortcuts


git-svn-id: http://graph-studio-next.googlecode.com/svn/trunk@147 c2f33eb2-41b2-391d-4cb4-d9d0608729ba