Take any m1cha one from cwm thread, remove recovery. IMG inside, rename my recovery to recobery.img, put the file in the zip flash and enjoy.
Sent from my nexus 7
This was not made by cm. Heads up it's a 4.5/5.0 feature. They found it inside aosp source code and just backported and added blacklist.
Cm has ota, but for professional builds it uses incremental files as stock roms.
Sent from my mi²s