[js][s]: s/play /play/g.
[html,vendor/pybossa][m]: refactor to use new pybossa.js library and fix issues with pybossa.js.
updated styles

Now parchment, with deep red boarders on a black background. Also with
neater margins.

Unable to prevent the crowdcrafting banner text turning grey. As far as
I can tell, this is a crowdcrafting bug, as I have not set text to this
colour anywhere in the css.
updated styles and page layout
[css][m]: lots of playing around and improvement.