make revlog.addgroup pass its file handles to addrevision This should fix issue255. It looks like the problem there happens when addgroup calls addrevision to add a full revision, and addrevision decides to split the index file into a .i/.d pair. Since addgroup has an open file handle for the index file, the renaming of the new .i file to its final name fails on windows.

Test for ba7c74081861 (update dirstate correctly for non-branchmerge updates) (Test case created by Johannes Hofmann)

merge with upstream