Add info about running tests to the README.
Rename dummy app views to use underscore naming convention.
Add .gitkeep to spec/dummy/db.

Absence causes errors first time you create your db.
Modify argument signature of CallInProgress#initialize, and so ttt_call().

An options hash instead of multiple "could be nil" args is neater and will better support addition of more options.
Modify argument signature of post_for_twiml!.

For similar reasons to before.
Add support for specifying http method rather than defaulting to post.

* ttt_call()
* in Gather scope
* in Redirect scope
Bump version.