Added a migrate database flag.
Fix size of text rendered as h1
Make sure header tags are the same size
Merge pull request #686 from alfhenrik/twitter-provider-text

Update Twitter provider text to ensure that header tags are not huge, fixes #685
Fix system web detection logic.
Merge remote-tracking branch 'davidfowl/master'
Enforce utc kind on user last activity field.  Could be handled better in EF instead of just fixed up at callsites though.