Resolves #155, adds a max_runtime for jobs.
Adding docs.
Merge branch '31_kill_running_actions' of github.com:dnephin/Tron into 155_max_runtime_for_jobs
Merge branch 'release_0.6.1' of github.com:Yelp/Tron into 155_max_runtime_for_jobs
Add another note to docs.
Merge branch 'release_0.6.1' of github.com:Yelp/Tron into 155_max_runtime_for_jobs
Fix test failure on merge.
Merge pull request #224 from dnephin/155_max_runtime_for_jobs

max runtime for jobs