Dependency updates

* Update gemfile to use gemspec
* Update version numbers of dependencies
* Move all dependencies into gemspec
Bump ruby version to 2.1.0
Update vcr rspec integration and usage
Remove fakeweb and update to ruby 2.1.1
Add 2.1.1 to travis ruby grid
Remove old rubies
Add rake back to bundle
Merge pull request #6 from mtchavez/updates

Updates