Add basic support for pagination and sorting

Allow the user to sort and navigate between pages without modifying
manualy the path of his datasources.

This is experimental and not tested for now. It need some refinement.
Give some love to users components <3
Use `sandbox.on` context parameter
Document methods added to Datasource
Adding user.profiles field to user_profile component
fixing aura version to 0.9.1 in bower.json
Merge branch 'develop' into feature/pagination
Merge pull request #89 from hull/feature/pagination

Feature/pagination