CaloConditions: Conditions objects for lumi-dependent pileup offset correction.

The cell-by-cell luminosity-dependent offset correction for adjacent bunches was implemented as an algorithm (CaloBCIDAvgAlg), but this took too long to be usable in the trigger. We can, however, speed it up dramatically by doing much of the work in advance and vectorizing the remainder. The processed data depends on the cell pulse shapes and OFCs as well as the per-bunch luminosity. The first two of these are saved in CaloBCIDCoeffs and the third (because it has a different lifetime) in CaloBCIDLumi.