Bug Fix and major changes

LINE:
Fix bug for "GO x,y". Only one axis should be running instead of 2 if
input specify one. (Eg LINE 1000,0 1000 0) then only x-axis running

RDUW_2.0:
Improved reset button. The loop counting is reset as well so that the
program can restart position recording after recording limit exceeded.

SBPB(stand for s-bend parabolic)
draw half portion of a directional couple instead of only s-bend
Implement code

1)Implement "SBPB" into "tokenizer" code and "RDUW_2.0"

2)"Terminate Program" dialog box is removed