Add in EULA view after registering

Currently this view grabs from
https://www.opentreemap.org/terms-of-service/ and trims out some of that
fat that is left using javascript.

We may want to reconsider how the workflow moves as well. Right now we
preload all of the content via the registration view and use manual
"push/pop" nav calls.
Merge pull request #140 from OpenTreeMap/topic/add-eula

Add in EULA view after registering