Add initial API docs.

Includes TOC and docs for creating and building streams.  Still much
more to write.
Add more API docs.

Revise API doc format to accomodate method + function versions of
combinators
Add initial merge docs
Add Element.matches event delegation example
Add merge and zip docs
Add transform and filter docs
Add more filtering docs
Add reduce docs
Finish first api doc pass--need examples
Remove old APIs from docs