removed (Basic)ConllChainNer, replaced with new ConllChainNer that extends ChainNer
Merge pull request #225 from k8si/chain-ner

removed (Basic)ConllChainNer, replaced with new ConllChainNer that exten...
remove PennPosTag from preqAttrs as the taggers don't  actually use PennPosTags for anything
Merge pull request #226 from k8si/ner-fix

remove PennPosTag from preqAttrs as the taggers don't  actually use Penn...
Removed unused dependencies from pom and sbt