+history, attempts to fix renaming

Coded missing function +history; Tried to fix issue with item renaming / revids with different name, unsuccessful.

http://codereview.appspot.com/6459066/

MoinMoin: GoogleSoc2012/BranchMergeSync/2012-08-17 (last edited 2012-08-18 12:59:02 by BorisBobrov)