Revision B of Lime differences to developer edition?

[Chax]

We have bought a couple of the developer edition boards when they just came out. I can't seem to find a changelog of what has changed in the 'revision b' files that are on the Guthub page and are probably the boards that are in mass production now.

Can anyone tell me the changes (schematic and/or board) between rev. a and rev. b?