Global registry code integrated
 - test works for Relay user completing a registration
Code for most all cases is now there
 - each method in `GlobalRegistry` now does exactly one thing
 - method for doing a lookup is there, but untested
Refactor logic inside `GlobalRegistryImpl`
 - use common "lookup" method
 finished documenting process
Adding documentation and other things
have the code refactored the way i want it, but a test fails
Need to quit if we don't find a matched person
some refactoring `ProfileServiceProvider` is now stateless
Only check for GR ID when interacting w/ GR