Always add team extension methods

- This is needed for rspec to work and when no key is specified
- Small addition to README.
- Added rvmrc to .gitignore
- Bumped version to 1.1

https://thinkneardev.atlassian.net/browse/REX-1237
i can't use any rails conventions in here, since I want this to be standalone. I didn't think pulling in an extra library was worth it for this, to keep it slim.