[Sane-analysis] Standalone tracking code on the wiki

[O. A. Rondon]

Hi,

I have modified my standalone target field tracking code to properly
take into account vertical starting angles. Details are posted on the
wiki, at

https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Standalone_target_field_tracking_code

For the output examples, one needs to keep in mind that the coordinate
system is a bit odd: beam is along x, vertical up is +z, beam left is
+y, so side view is x-z, which shows the vertical deflection, etc. This
system is a historical carryover that anyone interested is welcome to
change to some more standard system.

Note the straight line tracks from the cherenkov mirrors to BigCal on
the last set of plots on the page. Feel free to try plotting tracks for
anti-parallel field, other scattered energies, etc. Please report any bugs.

Cheers,

Oscar