Templatize TPAC CSS - change colors based on vhost

Templatize TPAC CSS - change colors based on vhost

Rather than requiring sites to copy & customize style.css for each site
that just needs different colors, and then maintain those changes
laboriously as style.css changes - or creating CSS files that override
the styles for each site - use the power of Template Toolkit to control
colors and other elements based on criteria such as the vhost name.

Signed-off-by: Dan Scott <dscott@laurentian.ca>