Full 5x5 shapes for offline electrons

Built ontop of CMSSW_7_1_X_2014-05-12-1400.
The "real" PR is only the last two commits.

This PR stores the shower shapes calculated using the full 5x5 crystal matrix with no fractions in GsfElectrons in addition to the old shower shapes. Other shower shapes are not touched.

A similar PR for photons will come soon.

@Sam-Harper