SupportingEvidence -> AnswerSupport

Supporting evidence in DeepQA parlance is an additional search based on generated candidate answers.
Get rid of a needless dependency on CSE and sqlite
takepig.basephase.AbstractAnswerGenerator: Fix exception in case of no answers generated
Add Ephyra-based NLP providers OpenNLP and NETagger

We will not put the big data files of res/ to git, these are available
externally at a documented location (or you could take them out of the
Ephyra distribution).
analysis.SentenceSplitter: The first Analysis class, together with framework.data.Sentence
analysis.NEExtractor: Another Analysis class, converting sentences to sets of NE
phase.ie.NEInformationExtractor: The first actually NLP-based phase

Prototyped based on the DSO project, though with much simplified scoring.