Finish off Acceptable Licensing header

* OSI Code licensing
* Default MIT licensing in the presence of CC
* No derivatives aren't allowed
* Unlicensing isn't allowed

Closes #56 and Closes #116
Grammar stuff.

Applies to #278
Add a catch all for acceptable licensing

Applies to #278
Make this GPL friendly

Applies to #278
Slight verbal change

Applies to #278
Some changes for JRinge... need to think on the last point for a bit.

Applies to #278
More verbage... addresses JRinge's concerns.

Applies to #278
Tweak the verbage for acceptable licensing.

* Must include the name of the OSI approved license in the Source Code either via key, header or full text

Applies to #278

Auto-merging
Merge pull request #278 from Martii/Issue-116LEGAL

Finish off Acceptable Licensing header

Auto-merging so we can use this... doesn't affect any of our site code.