move edit button; minor fix css style;
minor style of username
convert file 'new.html.erb' to ...haml
create application helper; add titles to views
Merge with move_edit_button branch and resolve merge conflicts.
Create model Visit. Create visit for each transaction.
merge with master
Added capybara screenshot.
Merge branch 'master' into add_tests_for_login_logout
finish integration test for login/logout