* XParser::FktExt is merged to Parser::Ufkt as it simplify the code when looping through the functions.
* Ufkt is now a standalone class, independent from Parser.
* The changes stated above forced me to re-write the procedure of adding a function: Now all data for the new function isplaced in a temp-variable, the function is created and then all data is copied to the new function.
* Both XParser and Parser were cleaned; some old functions were removed (the are not needed anymore as XParser::FktExt doesn't exist) and comments are added to the header files.
* KmplotIO has the XParser-object as a member variable instead of an argument to the load and save functions.
* A silly ';'-character after an if-statement made it impossible to define recursive functions before. That is fixed now.

And:
* The functions are now sorted in the edit-function dialog.

CCMAIL:kdmoeller@foni.net
CCMAIL:bmlmessmer@web.de

svn path=/trunk/kdeedu/kmplot/; revision=347322