Upgrade Vagrant's Ubuntu to 12.04.5, SSD-backed instance run on HVM; update instance type to "m3.medium" because that's the one which has a SSD disk as root
allow public registration
generate summary of user activity
Merge branch 'master' of https://github.com/berkmancenter/mediacloud
Merge branch 'master' into RELEASE_20140325
add missing alter
Merge branch 'master' into RELEASE_20140325