Remove obsolete header.
skip unknown xml tags also in lhe init block
Merge pull request #4531 from ianna/dd-cleanup

Remove obsolete header
Merge pull request #4532 from bendavid/py8matchingdev3

Last fix to lhe interface for mg_amc@NLO 2.1.2 compatibility
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X