[Clas_slow_control] A script for diffing the snapshot files

[nerses at jlab.org]

Sergey,

I've added a script called diff_snap.sh which will facilitate the
comparison of snapshot files. For example HV snapshots from ~epics/burt
directory. Or any snapshots generated by burt.

Conventional diff will not work, because burt generates PVes in a messy
order.

Regards,
Nerses