backplot of drilling cycle movement is drawn incorrectly.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Add a couple points
2. Create a drilling operation for them.  Set properties as appropriate
3. post-process and inspect the backplot.

set 
start depth 0
final depth -10
clearance. 5
rapid safety 1
max stepdown 5

produces gcode like:
Z5
G83 Q5 G98 X6.255 Y20.279 Z-10 R1 F10000

According to linuxcnc documentation, it should peck and retract to 1 and then 
rapid 5 after the first hole.  Then rapid horizontally at 5 to the second 
location.

looking at the backplot, the horizontal rapid appears to be at 1.  Loading the 
same gcode in linuxcnc shows it at 5.

http://i.imgur.com/lgCuMJA.png

This isn't a major problem but is misleading the user about how the tool will 
actually move.

Original issue reported on code.google.com by [email protected] on 4 Feb 2015 at 1:26