Refactoring of the replaces into functions (70X version)
Merge pull request #23 from gpetruc/micro-from700

Refactoring of the replaces into functions (70X version)
fix EcalClusterTools dependency
Adapt ConversionTools to mini aod (work with embedded tracks and add loose matching for reduced conversion collection)
add setters to egamma objects to allow relinking to reduced collections for mini aod
add ReducedEGProducer for creating reduced collections of electrons and photons with consistently relinked clusters and conversions
adapt mini aod configs to use reducedEgamma collections