New CHM eFLTK reference

Dear OpenSource community, i am pleased to announce new version of CHN eFLTK reference documentation. Now all XML-related classes are commented and by help of Doxygen (www.doxygen.org) we have very good reference doc. I would like to note that this CHM would be probably good not just for developers that use eFLTK in their projects, but also to developers that use FLTK (www.fltk.org).