majalan

Copperbox revision 2861.

I've added behaviours in the style of Paul Hudak's FAL (and thus Conal Elliott's Fran?). This feels like a big step that will add a lot of expressive power to Majalan - it's the first time I've ever managed to incorporate FRP style programming into one of my own projects, fourteen years (I think) after being totally beguiled by the FRP animations in Conal's Dr Dobbs Journal article.