Merge pull request #20 from ARTFL-Project/master

merge downstream
Merge pull request #21 from ARTFL-Project/master

merge downstream
early fixes for words-table in loader,postfilters
Merge branch 'master' of github.com:rwhaling/PhiloLogic4
Merge pull request #22 from ARTFL-Project/master

merge downstream
added PageWrapper for safe page object lookup
Merge pull request #266 from rwhaling/master

add pageWrapper and word table fixes