Add a count function to rqworker.py.

`Count` returns the number of queued jobs to a Redis queue.
Also add a log message stating that work has begun.
Add missing pusher requirement.
Remove the connection pool instantiation.

Redis is already using a connection pool by default.
Add a update_feed function.

Returns a continuous feed of update to a given database.
Fix bug terminated instances returned by all().

In module aws.ec2. All instances were returned and not just those running.
Module ccouchdb can be called as a script.

When called as such, it will sync a design document written as a YAML file to a
given database.

[#47442765]
Pin dependencies in setup.py.

Some package versions were update in the process.