Merge pull request #1 from typemytype/master

Adding support for extracting ttx files
Add support for extracting a UFO from a UFO. It sounds silly, but it is useful.
Update the arguments to support the new options available when extracting from a UFO.
Experimental support for extracting rom VFB using the vfb2ufo commandline tool.
Add support for the new formats.
Only listening for TTLibError will ignore lots of other errors, especially ExpatError. So, blindly try/except.
Merge pull request #1 from typesupply/master

merge with master