added beginnings of spaces working
Adding of the spaces uses the AddSpaceCommand

- mouse events are now recorded on spaces
Add Description Saving
Spaces can be dragged
Merge branch 'Spaces'
Adjusting space height on resize

- changed the order of adding children to the audio canvas
Loading Descriptions

Loads descriptions from a json file.
Merge branch 'master' of github.com:IMDC/LiveDescribe-Desktop