Add form partials for WP button copy

edit: I just added another main test html page for now.

WIP - handle case where no ffname - need advice on this templating
language. Want to do something like:

"{% block wp_ott_form ffname ? ffname : country %}" on line 42 in
worldpay.html halp

PS4 [K4]: Made the blue button overrides !important, so they
always override when this class is in use. Otherwise, they were
not working for me (ff 33.0, Ubuntu)

[pizzzacat]: fixed the blue/grey buttons

Change-Id: I4d7d87b1d586e85fd0ac27381602170c61bef736
Merge "Add form partials for WP button copy"