Update the README.md to reflect the new changes the the developers api console and in the calendar.rb script itself.
Use HTTPS to pull from rubygems.org

This corrects the warning when running `bundle install`

    The source :rubygems is deprecated because HTTP 
    requests are insecure. Please change your source to 
    'https://rubygems.org' if possible, or 
    'http://rubygems.org' if not.
Corrected heading for the service account sample REadme
Merge pull request #13 from lurraca/patch-1

Corrected heading for the service account sample README
Merge pull request #7 from fmendez/update-readme

Update  README.md
Merge pull request #11 from adamnbowen/patch-1

Use HTTPS to pull from rubygems.org
Updated prediction API sample to v1.6
Merge pull request #21 from ricardojr/master

Updated prediction API sample to v1.6