Patch to enable CDATA, plus odds and ends

Although tinyxml supports handling CDATA, there seems to have been no way to 
make use of it previously. The fix is pretty trivial; just a getter and setter 
to access the tinyxml CDATA getter and setter. 

Also included here are a couple of tweaks that I vaguely recall I added for 
performance reasons (in TiXmlElement::CopyTo and TiXmlAttributeSet::Add). 

Finally, there are two overloaded versions of ticpp::Base::FromString for 
floats and double which recognize "inf", "-inf" and "nan" and use the 
appropriate values from std::numeric_limits. Thee may not be suitable for 
inclusion in library, but since I had them I thought that I might as well share 
them.

Original issue reported on code.google.com by cnwea...@gmail.com on 2 Jul 2010 at 6:30

Attachments:

CDATA+stuff.diff

wxFormBuilder / ticpp

Patch to enable CDATA, plus odds and ends #60