
v1.0
   Initial Release.

v1.0.1:
   Compile with GTK versions 1.0.x.

v1.0.2:
   Added undo.  Up to 10 commands can be undone. 
   Trap the Ctrl-c keypress and quit.

v1.0.3:
   Map the ^ key to the x^y function.

v1.0.4
   Handle keys in number pad correctly.
   Fix memory leak in asin and atan of complex numbers.
   Fix malloc/ free errors introduced with the undo feature.
