gui bugfixes
fix clone & new footprint
fix gui move command
fix autozoom where label is larger then footprint (Closes #59)
darwin issues
slightly rework selection_model handling to hopefully please pyside 1.1.2 on OSX
Merge branch 'master' of github.com:andete/madparts into extern-darwin

Conflicts:
	gui/library.py
note the harmless error seen the first time the program calls glClear