new modular address generators (WIP); SIPDA allocates benvs using fun
node instead of app node (moving towards more classic k-CFA)
moved GC (only on eval) inside CESK, removed GC from pushdown
reorg: grouping related objects around CESK (ag, benv, parts of
lattice);
addid lcipda (WIP)
lc closure memoization (gc off by default in web)
Merge branch 'master' of https://github.com/jensnicolay/jipda

Conflicts:
	cesk/cs/benv.js
	cesk/cs/schemeCesk.js
	cesk/es5Cesk.js
	cesk/js/jsCesk.js
	driver/pushdown.js
	instance/jipda/build.js
	lattice/lattice.js
	lattice/lattice1.js
	lib/web/vizgraph.js