* Add a hook to allow modifying the the behaviour creating tiddler paths
This is needed for Bob to use the core to generate tiddler fileInfo
I don't know if this is the best way to make the hook, but it works for what I need
* update th-make-tiddler-path arguments
the value is the current path, the parameter passed in is the original unmodified path so it is available to subsequent hooks
c1a1e272cc