/controllers/back/ & /views/pages/back/: added placeholder pages for back-office
/views/: removed footer text "report blah blah" for back-office
/views/: added background image
/views/img/: removed old background image
/views/pages/back/: added bottom padding in login page
/views/pages/back/: changed text in nobutton menu
/ & /views/: added special thanks in README and humans.txt