Rough outline of the F1 attribute logic.

Parts of addAttribute have been implemented in F1User, but I may move it
out into a general F1 API class.
Moving F1OAuthHelper to F1Access.

F1Access will provide a collection of F1 API methods, rather than
placing all of those methods in F1User as I was originally planning.
Adding Support for Assigning Attributes in F1.

Adding a new interface, F1API for F1 APIs which require a valid access
token. This is now used by AssessmentResultsPage to assign an attribute
each time someone completes the assessment.

Also adding an AttributeTool to list all attributes and assign
attributes to users.
Removing comment.
Assign Training Attribute on Chapter Complete.
Merge branch 'f1-attributes'