minor spelling error
made Iter.next() support the optional default value in the end case. Example: Iter.next(iterable, null);
documented Iter.next(it, default), Iter.pluck, Iter.zipWith and Iter.chunked.
Merge branch 'master' into gh-pages

Conflicts:
	doc/html/MochiKit/Iter-ext.html
	doc/rst/MochiKit/Iter-ext.rst
re-added forEach to return(pipe) the input fn (accidentally lost in recent manual merge update).
added Iter.forEachIdx mostly as an example of zipWith usage (not documented).
updated compressed package with latest changes.
Merge branch 'master' into gh-pages