merge from branch: make tort more useful for detecting lost position

Author: jepler

nc_files/tort.ngc

@@ -1,5 +1,7 @@
 g21
 G0 X0 Y0 Z20
+(msg,note axis positions... will return here at end of pgm. press 's')
+m0
 F100
 G1 X2.000000 Y-4.000000 Z16.000000
 G0 X2.000000 Y-1.000000 Z16.000000
@@ -276,4 +278,5 @@ G18 G2 (75 14) I-1.035276 K-3.863703 X-26.140586 Y11.324350 Z-5.476374
 G1 F230 X-22.640586 Y15.324350 Z-7.476374
 G17 G2 (255 59) I2.329371 J8.693332 X-15.811214 Y31.811911 Z-8.976374
 G17 G2 F900 (45 135) I-1.414214 J-1.414214 X-18.639641 Y31.811911 Z-11.476374
+G0 X0 Y0 Z20
 m2