Add options image_size and image_aspect_ratio.
Also add specs for each option.
Finally, update README to reflect code changes.
Rework image_size option to receive an integer.
Also add spec for new possible value.
Finally, update README to reflect code changes.
Merge pull request #60 from GuilhermeSimoes/image-size-and-ratio

Added options to change the dimensions of the user's profile picture
Bumped version
Update README with CallbackInfo

Pull in examples from devise wiki
Merge pull request #63 from kurtisnelson/master

Documentation update for devise
Allow per-request changes to the prompt authorization parameter
Merge pull request #65 from rayners/master

Allow per-request change to the prompt authorization parameter
Slight updates to the readme
Slight updates to the sample app to reflect prompt changes
Updated examples and sample app
Updated Gemfile
Minor changes to requrie logic in Rakefile
Updated gemspec with minor tweaks
Require tweaks to omniauth-google-oauth2.rb
Minor require tweak to google_oauth2.rb
Bumped version to 0.2.0, there are breaking changes
Updated spec helper requires
Removed empty rspec configure block since we don't use it.
Minor tweaks to readme for clarity