Added Textile help.  Closes #434.
Merge pull request #432 from wcaleb/searchjs-tweaks

Improvements to search.js
Revert "allow for patterns containing punctuation, metacharacters"

This reverts commit 10dc85643ca6348fd3fee615d6a2f227fe607012.

I think I prefer the less misleading word boundary behavior.
Added DocBook and Org markup help.
Updated CHANGES.
Merge remote-tracking branch 'upstream/master'