Upped version number and removed deactivate method.
Fixed the migration that was losing existing dates
Tested and got the extension working with 0.8.1
Backing the version number to .4
Added install instructions since script/extension install is having trouble.
Changed admin.page.edit.add target to avoide conflict w/page_review_process extension
Merge remote-tracking branch 'upstream/master' into merge-with-mghaught