Recipe Robot 2.0.0 release candidate 3

Changes since RC2:

Added

• Added Sparkle shortVersionString to verbose output. (#173)
• Added code signature team identifier verbose output. (#174)
• Re-added file download progress to command line output (using curl's --progress-bar feature).

Changed

• More robust Sparkle feed processing. (#173)

Fixed

• Possibly fixed issue that was preventing app from displaying realtime output.
• Fixed an issue that could cause a disk to fill up with recursive links. (#158)
• Caught an error that resulted from neglecting to cast certain lists before writing to recipe plist.
• Better handle download file inputs that are lacking kMDItemWhereFroms extended attributes.