Insert command to count job locations in a tutorial

[rachellombardi]

Update Quickstart tutorial or create a page on condor_history to include how to generate a distribution of where jobs ran.

Using code like:
$ condor_history 21369266 -limit 100 -af MATCH_EXP_JOBGLIDEIN_ResourceName | sort | uniq -c

To yield output like:
13 Crane
1 Georgia_Tech_PACE_CE_2
5 LSU-DB-CE1
16 ND-CAML_gpu
55 Rice-RAPID-Backfill
5 TCNJ-ELSA
2 Tufts-Cluster
3 WSU-GRID

Remember that -limit and -af will need to be defined in this page.