Early Week Changes

MAIN.css:
Gave SVG + CANVAS max-width 100%
Moved P orphan and widow rules to print styles
Added PRE CODE
Added .pull-quote-left
Removed full-width table rule
Most input webkit appearance removed
Returned Button margin
Added .scroll-y rule for scrollable overflow-y
Disabled selection background
.container margin/padding top and bottom are not zero anymore

INDEX.html
Some documentation
Took basic navigation out of sandbox