Pretty substantial javascript refactoring:
* All javascript is now in funtions.js. There is no javascript at all
in index.html
* Configuration options moved from template.html to config.js
template.html moved to web_assets/index.html
config.js allows you to specify pattern-label pairs. Each label will be
added to an on-screen "signposts" control. Clicking the checkbox by
each label will show/hide any signposts that match the pattern attached
to that label. config.js has some examples.
TODO:
* The signposts control needs better styling.
* The new javascript needs testing in IE. Seems ok in Chome and FF.
These large changes may be hard to merge if you have non-trivial JS
changes to template.html locally. Apologies in advance
