1.0.beta1
Update render_mako.rb
Change faraday version constraint to pessimistic

The current dependency constraint of '>=0.8.6' for faraday is causing
`bundle outdated` to error out on a project I am working on. This is
due to faraday-middleware being incompatible with faraday 0.9 and
bundler trying to update to faraday 0.9 from the lax balanced
constraint.

By switching to pessimistic versioning, we can avoid this dependency
problem without limiting users to any different version of faraday
since faraday-middleware shares this version constraint.
Use ruby-version. Set ruby-version to 2.1.0
Change security_code to cvv on card_create
update scenario.cache
Fix dispute spec to pass test
Update README.md
Correct associate a card scenario
Fixes balanced/balanced-ruby#164
Add CHANGELOG
expose accounts and xfers, add a build number to the versioning