split format and random out of util
draw the require graph
scripts is better location for dot files
move wiki.getItem to dom.getItem
move wiki.emitTwins to refresh.emitTwins

With this commit we change the refresh package
to return an object, not just the refresh function
which is now just one of the functions offered
by the package.
move wiki.registerNeighbor to neighborhood
oops, activity plugin depends on wiki.util