add the db [ci skip]
explicitly require Haml to prevent non-threadsafe loading
get rid of the DB files for good
ignore .db files in case there is some left over
delete bcs of renaming to signin.haml
fix: will use disk-storage sqlite even on travis
add pure-css, font-awesome and custom css
rename login to sign in
add simple sign in/out feature
use Puma
they told me to set the set Rack::Session::Cookie secret, so I`ve set it
use # instead explicit ids
use the session user hash
rm clutter, move `/:profile` to bottom, use session user hash, login? -> signed?

- remove clutter, e.g. commented DM setup for in-memory sqlite
- fix: move `/:profile` route to bottom, so other routes can be processed too
- fix: since user`s primary key is their email, let`s use a hash for session identification of a user: session[:user] = {name: 'John', email: 'john@here.com'}
- change `login?` to `signed?`
fix: broken redirection for test_0006
allow user to view their profile
test if user cant access other users profile