Elizabot

Classic therapist bot, for your tweeting pleasure.  I wanted it to use the Clever API but apparently they've shut it down/changed it.  So it's Eliza instead.  How does that make you feel?

Not ready to merge yet.  Todo:

- [ ] Procfile for Heroku deployment
- [ ] Setup script to assign bot handle (currently hard coded to silshack). 
- [ ] Starting up the bot from scratch will produce a lot of duplicate responses.  Figure out a way to limit this

Anything else?  Sometimes I get a duplicate tweet 403 but I added random suffixes to the responses so that fixed that.