relax SVN archive

The command used was:
svn merge -r23508:23507 .

.....
Modified the dim dimensions to (None, 4) to allow the user to change number of points in the GUI.

THe first dimension was used as a counter, the last 3 dimensions is for x,y,z position.

This is for the user function dx.map.

Modified:
trunk/user_functions/dx.py
.....