Handle 422 Unprocessable Entity from API
Check timestamp age before calling the API
Refactor time comparison for timestamp age verification
Change some Cucumber tests to use relative timestamp (since we now have a restriction on timestamp age)
Add a cucumber test checking that a message is displayed when the timestamp is too old
Less problematic approach with rvm use --create
Add contribution guidelines + fix link references.
Don't enforce newlines in text-blocks.
Add a good way to promote contributors.
Merge pull request #141 from futhr/better-rvm

Less problematic approach with rvm use --create
Correct contribution steps for this gem.
Merge pull request #142 from futhr/documentation

README updates and new CONTRIBUTION file.
Merge pull request #140 from Locale/display-api-error

Display additional information when the timestamp is too old.
Minor bump to version 0.7.2

We only need a minor bump so anyone may get this update.
Merge pull request #143 from futhr/feature/minor_bump

Minor bump to version 0.7.2