Fixes and improvements for xmerl

[nox]

Hi there,

I need to implement xml-c14n [1] and xmldsig-core [2] specs for a client of mine and I have stumbled upon some bugs and shortcomings in xmerl. So I fixed them, and I hope I'll have done it well.

	git fetch git://github.com/nox/otp.git better-xmerl

The commit messages should be pretty self-explenatory but feel free to ask any question.

Regards.


--
Anthony Ramine
Dev:Extend
http://dev-extend.eu