* delete only keys with prefix
* Make redis_provider atomic with transactions and lua scripts
* improve lock
* generate change_id in redis to make sure it is uniq
* use miliseconds as starttime
* add argument use max_change_id to get_{full|resticted}_data
* geis does not work with channels2 and never will be (it has to be python now)
* pytest
* rewrote cache system
* use username instead of pk for admin user in tests
