Merge: FlexBridgeBeta->default
Change Copyright dialog to make it clear that the sencond field is the copyright holder.
Make Abbreviation a way of persisting LicenseInfo (good for json).

Makes public the Abbreviation method of CCL and extends it to other kinds of LicenseInfo.
Adds FromAbbreviation which can make any of the existing subclasses from an abbreviation.
Merge: FlexBridgeBeta->default
Adding .gitattributes and .gitignore files

This is in preparation for the migration to git.
Add more tests around round-tripping License via "token" strings.
Enable "additional requests" prose to accompany creative commons license. Added 2 links to web pages explaining CC rules.