Add menu support, new options.  Some cleanup.

Adds options for interpolation-type and
use-psd-smart-object-pixel-scaling
Minor tweak for Mac
Add "Sources" link
Fix Debug and Sources debugging links to work.
Update debugging links
Bump version numbers.
Add missing string.
Merge pull request #8 from adobe-photoshop/jp/newopts

Add new options, sources & debug links.  Bump version numbers.