Add metadata field to Classification table

Seperate out metadata from annotations, expect annotations in a key => value
format. Closes #252
Update to jruby-1.7.16.1
Update Apiary host
Fix Typo
Add Project Content Api docs
Merge pull request #258 from edpaget/update-ruby

Update to jruby-1.7.16.1
Merge pull request #260 from edpaget/apiary-update

Add Project Content to Apiary
Merge pull request #255 from edpaget/update-classification-schema

Add metadata field to Classification table