Merge pull request #1 from FontBureau/master

update from master
improved setting the tool bar icon and storing resources

For more info about the "ExtensionBundle" object see
http://doc.robofont.com/api/mojo/mojo-extensions/
Also see the extension spec
http://doc.robofont.com/extensions/extension-file-spec/
Merge pull request #1 from typemytype/master

patch for the BoundingTool