rhbz1110627 zanata init

https://bugzilla.redhat.com/show_bug.cgi?id=1110627
and https://bugzilla.redhat.com/show_bug.cgi?id=1038852

Depends on https://github.com/zanata/zanata-api/pull/15 and https://github.com/zanata/zanata-server/pull/520
This will only be accurate a third of the time. We might want to call it `everyThirtyDays` and present it to the user that way. On the other hand, I doubt anyone would notice the inaccuracy in practice.