Git 1.7.11.5 and Git 1.7.12-rc3

The final release candidate for 1.7.12 is found at the usual places. Again, nothing earth-shattering.

For highlights of the upcoming release, please see the previous entry on 1.7.12-rc1.

Also there is an updated maintenance release 1.7.11.5 that fixes some minor build issues, with updates to "git-blame.el" (in contrib/).