[Closes #15] CS team lead plugin

Pinging for review:  @jcarouth, @jmacadam, or @amdtech.

Apparently CS has this manual process of looking up daily team leads and announcing it to the room, let's start letting Jarvis handle part of that.  This is also super simple script we could modify in future Ski Schools.

Tagging @ryanwaters since we had discussed this: This example hits a few of the standard Hubot features like `#topic`,`#send`, and the use of the brain.  Doesn't need to be overly complicated or worry about APIs, most of what is necessary is already available either on `robot` or the `msg` object.

Potential future features:
- Use a room announcement (requires: #4)
- Support beyond today
- Remote data source