Changes from 0.19.2
===================

New Features:
* Source view for Revisions
* Rails updated to 2.3.14 (Security)
* itextomml updated to 1.4.6
* Replace REXML with Nokogiri in Maruku and
in xhtml_safe_sanitize().
(Huge speedup in rendering long pages)
* MathJax updated to 1.1a final

Bugs Fixed:
* Bundler upgraded to 1.0.18
* Fix null search bug
* Better text/html serialization (thank you, Nokogiri)
* Fix Maruku footnote backlink (reported by Shamaoke)
* Fix Maruku link bug
* Fix Maruku image title bug
* Fix Maruku hrule, email address and header bugs
* Fix Maruku bold-in-italics bug
* Fix Maruku empty list-item bug