More styling, home page, edit widget

Updated the home page with big character tiles.

Updated routing et al. to support character summary vs. edit pages.
There's a little floating widget to flip between them, which (in edit
view) also provides the instant-access visibility for remaining skill
and key points.

Also did some general link styling, including starting to add in support
for the colors as defined by Kuler's triad view for #c8012e.