Include Oat Ruby gem in library list

[ismasan]

Hi.

I wrote the Oat gem a while ago as a media-type adapter layer that allows your code to declare resource properties at the message-level. Blog post and rationale here:

http://new-bamboo.co.uk/blog/2013/11/21/oat-explicit-media-type-serializers-in-ruby

It's being used and contributed to by a few devs, and bundles a HAL adapter.

In case you're interested in listing it.