adds login capabilities

Still no password hashing, but introduces a permission system.
oh and I forgot to update readme
fixes a few template bugs
fixes some of the shit i did the other day

Views now get the environment, thus are able to manipulate sessions
themselves.

Also I added a small method to enforce logged_in_status. It hould
be integrated with werkzeug much more cleanly, though.
adds stream view

makes first attempt at streamlining the user verification process and -
as usual - fixes a few template bugs.
Now Users can change their profiles and passwords