InitFS: add an "upgrade" command to install all missing migrations
InitFS: add an "upgrade" command to install all missing migrations

Ignore-this: f98e75764a48652272248b32e42994e7

darcs-hash:20090606052011-e018d-010cf163aa19efa9a954d596ff6e2322fd2acee5.gz

nick0x01/dbmigrations,jakubfijalkowski/dbmigrations,nathankot/dbmigrations,creswick/dbmigrations,anton-dessiatov/dbmigrations