cleaning up whitespace
Merge pull request #31 from paulbellamy/whitespace

cleaning up whitespace
Add feed device_serial and product_id
Merge pull request #33 from levent/feature/feed_api_show_device_serial_and_product_id

Add feed device_serial and product_id
Use https://rubygems.org in Gemfile
Merge pull request #34 from levent/master

Use https://rubygems.org in Gemfile
BSD License
Contributing doc
Update gemspec for new docs
Merge pull request #35 from levent/license

License and Contrib docs
point to Xively