SUI to deleteq.php, added button class .centered

The question (and answer if one exists) are now shown at deleteq.php
.centered works with buttons and uses absolute positioning
.ui.segments and .messages have text-align: justify
Added SUI success message at register.php
SUI to login, added class orangeBg, center940/480

Changed #qContainer and .question max-width
Added classes center940 and center480 to help with max-width
Added class orangeBg for an orange gradient background
Fixed small bug at profile.js, result of transition to semantic