Some const correctness
Add test to check ref jet removal
add in override to derived class
Set better defualts for matcher params
First version of L1ExtraTree class to aid looping over files
backup of modified L1ExtraParticleProducer
Update buildfiles - could be some extraneous rubbish in there though
Rename produceMatchingPairs to getMatchingPairs
First version of Matcher client code in RunMAtcher. Also add in plotter in DeltaR_Matcher for debugging