A bunch of changes

This is branched off #17.

**Summary of changes**
- Some pretty large changes to the docs. [Take a look](https://github.com/taskrabbit/forklift/tree/misc)
  - Added a heading for example plans and some other header changes. 
  - Trimmed down example/plan.rb to basically be a placeholder because otherwise we have too many places to look for example plans. Now there's just one place to look: the readme. 
- Improves the way we send config to Pony. This change makes SMTP sending work
- Adds a .gitignore to the generator to ignore pid/ and log/