Updated PFRecoTauDiscriminationByNProngs
copy pfChargedMET_cfi.py as pfChMet_cfi.py
remove needless options in pfChMet
update alias for pfChMet
add test for pfChMet
remove test for pfChargedMET
remove pfChargedMET_cfi.py, replaced with pfChMet_cfi.py
Merge pull request #3540 from slehti/from-CMSSW_7_1_0_pre6

PF -- Updated PFRecoTauDiscriminationByNProngs
Merge pull request #3586 from TaiSakuma/metdev-71X-140429_01

Reco -- rename pfChargedMET pfChMet
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X