Updated version 2.4 release notes.
Add a (failing) test for Smarty extension.
smarty: Get rid of canonicalize() function.

The previous problem happened because canonicalize() removed the
space from closeClass regexp.

Instead of fixing the function, get rid of it completely. It should
also make module load a bit faster.
Merge pull request #287 from mitya57/master

Release Notes and a fix for Smarty