Implement saving for TiddlyWiki Classic

The basic concept here is that the empty.html is modified to
load bootstrap.js after startup. bootstrap.js then loads all
the tiddlers from the recipe, skipping app (empty.html) and boostrap.

It evaluates those tiddlers which are systemConfig and then
effectively restarts the wiki by refreshing everything.

tiddywebplugins.status had to be added as TiddlyWebAdaptor wants it.

Some details:

* server.content-type is set in default fields to text/x-tiddlywiki
  to ensure that tiddlywiki tiddlers have a set type
* no testing has yet been done with themes but that will come with
  time

Presumably a similar trick should work for TiddlyWiki 5