Move XMLBase.xmlify out of class and to a function

[MerrimanInd]

This doesn't need to be inherited since it makes no use of other class-owned data or functions. Move it to its own function and fix all callers.

[jsam-jhg]

Can you also add the following to the replacement_dict? xmlize["\n"] = "
" # Newline xmlize["\t"] = "	" # Tab xmlize["\r"] = "
" # Carriage return