Workflow

filterAll: Adds definitions.

Performs cuts:
    Fiducial

    Unused tracks/showers:
        0: No unused tracks or showers allowed
        1: 1 unused track allowed
        2: 1 unused shower allowed
        3: 1 unused track and 1 unused shower allowed

    preShower:
        preforms preBCal shower cut, based on inupt parameter

    PoverE:
        performs pOverE cut, based on input parameters (+ & - sigma bounds).
            Note: minus sigma bound should be negative.

    EMiss:
    Cuts on missing energy, assuming stationary proton.

Saves all information to a tree.
Currently doesn't create any histograms. I will implement this later.

makeHists: make histograms for p, em, ep, jpsi, as well as other histograms of interest.

Easily extendable to make different cuts (E_gamma, pt, etc.), and make histograms for those too.
I haven't implemented this yet.