Shift not included in touch files

[andredonadon]

In the current version, since the shift given by the position of the collimators is treated by modifying the position of the particles when arriving the collimator (track.py:~70), the position of the particles dumped in the touch file do not include this shift.

Possible solutions:

1. Do not apply this shift to the particles in track.py and set the collimators shift in fluka_builder.py, translated in the use of the INROT_* (ROT_DEFI) cards to generate this shift, through the insertion.txt.
   2 . Find a way, maybe avoiding the use of the insertion.txt and postprocess the position and angle of the dumped particles (?). I think it is much more complicated though.