[PEPPo] run plan evoluation

[Joe Grames]

Dear All,

Most recent version of run plan tasks here:
https://positron.jlab.org/wiki/index.php/Physics_Run_Plans

Send or post commissioning tasks (goal, beam/configuration requirements, 
time estimate) ASAP!

1. Scintillators dE, E checkout
2. Background studies
    knobs = set current, target, jaws for approximate running conditions
    goal = learn configuration trade-off between shielding and T2 
location, to optimize signal:background
3. Annihilation counters
4. Fiber array
5. What else?

-Joe