Updating to allow direct retrieval of valence tokens and to authenticate full URLs

There are now two methods that return an enumerable of tuples that
contain the valence parameters (x_a,x_b,x_c,x_t).

There is an additional method now to return the tokens that are created
from a full URL(includes host, not just path)
Corrected name of method.

Changed CreateAuthenticateUri to CreateAuthenticatedUri.
Additional unit tests for verification and formatting changes.
Merge pull request #2 from dcollied2l/master

Update to create auth URLs from full URL