Update NEWS
Pre-release version bump
Fix the release date, cause this has never happened before...
Remove unmaintained and obsolete VC modules

Both Arch and Codeville are unmaintained upstream, and our modules also
receive no maintenance.
Make the null VC plugin claim to handle no actions
Clean up the null VC module
PEP8 mercurial module
Remove unused constants from Git class
Move cmdout from misc module to vc.svk, which is its only use
Remove unused old-style action methods from git
Support new-style file retrieval in Mercurial
Support unused remove and resolved new-style commands