Log Message:
Update to 3.1

Changelog:
3.1 2014-01-27
     The filter command now has a --replace modifier to avoid regex overhead.
     Associated branches are renamed when a reset or tag is moved or deleted.
     Bug fix for off-by-one error in tags reporting.

3.0: 2014-01-05
     Many syntactic features of the language have changed incompatibly.
     Backward-incompatible language changes are documented on the manual page.
     'expunge' and 'unite' commands have been incompatibly improved.
     New 'strip' command for generating test cases with blobs stripped out
     New 'reduce' command for topological reduction of test cases.
     The 'lint' command gets a test for the existence of multiple roots.
     Selecting a date or action stamp matching multiple commits now matches all.
     The surgical language now has a macro facility.