Resolves issue #66

- Added "Origami: New Window from Saved Layout" command
- Added "Origami: New Window with Current Layout" command
- Added "Origami > Window > New" toolbar menu access
- Misc. cleanup of previous save layout code and formatting
Resolves issue #66

- Re-worked the __init__() method on all classes
- Improved handling of layout data storage within classes
- Added check for same-name layouts with option to cancel or override
Merge pull request #73 from 23maverick23/master

Resolves issue #66