Merge pull request #7 from FacultyCreative/features/allow-nested-validations

Allow nested validations
Release v0.2.5
Add errors#isEmpty
Add spec to clear errors on a field or the entire model
Add model.instance#clearErrors(field)
Release v0.2.7
Update README.md
Update README.md
Stringify circular references when $saving data
Release v0.2.8
Merge branch 'master' of github.com:FacultyCreative/ngActiveResource
Add ability to serialize model instances as JSON
Release v0.2.9
Add timestamp module
Add includeEmptyKeys and prettyPrint options to serialize and toJson functions
Release v0.3.0
Update README.md
Add ability to serialize arbitrary Javascript objects with ActiveResource's serialize method.
Update README
Release v0.3.1