Remove alembic.

No need for database anymore.
No more pycas
Update README
Update installation instructions
pep8 is for pros
Add blacklist
Add example config file
More reasonable routing
UI is cool
Remove unused template
Add favicon
Add success page
Add logout button
Fix ommision in form error
Change an annoying way of removing a key
Improve form ui
Make logout button more obvious
We don't need to load the secret key manually
Validate the phone number of the user
Clarify error messages a bit