CYB-292 Write script to start sidekiq, introduce foreman

* Sidekiq and clockworkd both now use tmp/log and tmp/pids
* new individual start scripts which are called by the Procfile

https://jira.ets.berkeley.edu/jira/browse/CYB-292
Merge pull request #189 from coyote/foreman_add

CYB-292 Write script to start sidekiq, introduce foreman