Issue #87, Step 1: Break Hipchat actor into multiple classes.

Move common methods into a HipchatBase actor class, split up unit tests
as well.
Issue #87, Step 2: Implement hipchat.Topic actor.

Full actor code, unit test and integration tests.
Issue #87, Docs
Issue #87: Quick indent fix
Issue #88: Rollbar Deployment Actor

This actor interacts with the Rollbar API to send 'Deploy' messages
during your code deployments. Dry mode validates the API access by
reaching out and getting a list of projects with the API key. Wet
(non-dry) mode actually sends the Deploy API call.

https://rollbar.com/docs/deploys_other/
https://rollbar.com/docs/api/projects/#list-your-projects
Merge pull request #131 from Nextdoor/issue_87

Issue 87 - Add hipchat.Topic actor
Merge pull request #132 from Nextdoor/issue_88

Issue #88: Rollbar Deployment Actor
Bugfix: Ensure the hipchat integration tests re-get the token
Issue #114: Track execution time and print it out in debug statements.

This is just the beginning of this work.. but its a simple wrapper for
now to track the execution time of every actor and log it to a debug log
statement. In the future we can add optional printing of these
statements, global statistic tracking, and even some kind of reporting
at the end with the stats.
Merge pull request #133 from Nextdoor/issue_114

Issue #114: Track execution time and print it out in debug statements.
Check script inputs for Execute actor.
Test RS inputs using split()