Added a Flip4Mac-3 pkg recipe.

I made up a quick pkg recipe for Flip4Mac-3. Some things of note:

The munki recipe uses the Flip App for its version information. I used the Plugin's Info.plist instead. Also, the CFBundleShortVersionString has some whitespace at the end, so I used the CFBundleVersion instead.

This recipe just copies the downloaded pkg to a new file with an appended version number.