[Clas12_calcom] first draft of pass1 review slides

[silvia]

Dear Calcom and RGC,
I have prepared a first draft of the slides for the pass1 review: 
https://box.in2p3.fr/s/BQHfiJnXY6xKmrA
If you could please check them, it would be great.
Things that will be added shortly:
- SIDIS analysis on the test runs
- Estimates of computing resources
- Back-up slides
- whatever has written "to be done" on the slide :-)
Thank you all for your contribution!
Best regards,
Silvia