Added Electron FlatTree creator. Added ElectronScattering C12 data into database and placeholder for interface to full e-A database. Fixed some stability issues to NuisConfig/NuisKey. Added erase in ParserUtils::Counter function. Removed various cout statements. Added full comments to the two EventManager reconfigure loops inside JointFCN to explain whats going on. Removed deprecated LoadSamples and constructore functions from JointFCN. Cleaned up ComparisonRoutines parser. Made cout statements inside NuWro InputHandler prettier.