Additions to C Bindings

[Christopher O'Neill]

Hi all, 

	I have been working here and there on a project which uses taglib with the C bindings.  I noticed that much of the functionality of the C++ is not accessible through the C bindings (particularly, access to many of the common tags, and to album artwork).  I have added some code to tag_c.h and tag_c.cpp to allow access to these items (including album artwork) from the C bindings.  I was wondering if it is possible/desirable to submit my additions, and if so how to go about doing it.  

	Thanks in advance.  

	-Chris