migrate to 4.9 - package codec/perfield
migrate to 4.9 - package search
fix unit test for package store
fix unit test for package index
implement DefaultIndexChain.processDocument()
fix TermVectorsConsumer.startDocument()
implement DefaultIndexChain.fillStoredFields()
implement DefaultIndexingChain.startStoredFields()
fix DWFC.assertMemory()
implement DefaultIndexingChain.abort()
implement TermVectorsConsumer.abort()
implement FSIndexOutput ctor
implement DefaultIndexingChain.finishStoredFields()
implement DefaultIndexingChain.processField()
implement DefaultIndexingChain.getOrAddField()
implement PerField.setInvertState()
implement FreqProxTermsWriter.addField()
implement TermVectorsConsumerPerField ctor
implement TermsHashPerField ctor
implement TermVectorsConsumerPerField.newPostingArray()