removes unused LoginForm widget
changes default square style to GREEN
changes game tab label formatting to use pipes as separators
sets main font colour to #202020 and gives password inputs same style as normal ones
removes 'dashboard' and merges login and registration forms

the plan is to have login and registration use the same form - if the user
clicks register with nothing entered, they'll get an error which will let
them know that the form is the same and it will be the same number of clicks
anyway