Only show the Pocket username when logged in to Pocket.
Clarify "logged in" message for Pocket API.

Maybe someone wanders off, then finishes logging in to Pocket later. Then they
get an out-of-context message about having "logged in".
Move Pocket API to its own URL scheme.

It was hijacking awful:// URLs that had nothing to do with Pocket.
Fix Video embed fix.
xcodeproj group rename.