Add Brem support in v2 (SOA) Event Model. Here a (very) simple brem object is added and is zipped as a part of a charged basic. The idea is to have a single Brem correction be zipped in as part of a composite as well. This Composite brem correction would then be calculated on in the combiner based on the brem corrections of the daughters. Aiming to fix #107. Run with Rec!2417 (closed).