To avoid conflicts with pulled in article tags
Check to deal with bad readability returns.
Ignore domDoc transform if unneeded
Temp incomplete patch for #117
Fixes base problem of #117

Why does this fix the problem? I guess because this function was written
by crazy people. Apparently if it converts a string into XML it doesn't
automatically enforce the required structure. So, by giving it one big
XML container to sit inside. it negates the issue. This is an avowedly
stupid solution, but as far as I've been able to tell, it's the only one
that works, so this one is on you PHP.
Even better sanitize in readability objects

I just discovered the treasure trove of functions that is
formatting.php.
http://core.trac.wordpress.org/browser/trunk/wp-includes/formatting.php
Prep for tag release assuming all tests are go

Contingent on approval to close #117.
Merge branch '2.0.x'