Remove unused authdb manipulator.
Rearrange repository structure into something like a gem.
mozilla/browserid is needed for tests, not for the gem.
Don't rely on a Web resource for jQuery.

Doing so just gets in the way of offline testing, which I do a lot of.
Merge env and world files.
Add back a missing step.
BrowserID process control for tests.

Note: Yeah, SIGINT is required to terminate all the BrowserID process,
not SIGTERM.  The latter will only kill the parent and leave the
children around.  It's kind of silly.
Gemify.
Capybara::Persona is now a thing.