Update project settings and gitignore.
Merge remote-tracking branch 'upstream/master'
Add simple Undo/Redo implementation, needs to be redrawn. Fix bug where Save/Close is disabled when user cancels close. Fix bug where user is unable to reselect the previous brush after using the eyedropper.
Move redrawing to EditorMap and make Undo/Redo redraw correctly. Fix a small bug that left artifacts on the canvas when removing some objects.
Merge with upstream.
Added workaround for a drawing bug. Fixed a logic bug in original update code. Refactored some stuff.
Undo workaround, add Refresh to View menu.
Fix up the menu bar. Show orientation in object preview.
Always show selections on tree views
Have the Image Box steal focus on mouse over so that mouse wheel can be used without clicking.
Merge pull request #2 from heinermann/master

Undo/Redo and small improvements