remove classes from English language plugin which won't compile yet; fix test classes to reflect API changes in AbstractTermData
remove stale documentation
rename class VerificationHashSet to WhitespaceAndSuffixTolerantSet
rename generic field mTestObj to tolerantSet
add and rename unit tests; use Hamcrest matchers
rename tests
introduce inner helper class StringNormalizer; change implementationa and add tests for WhitespaceAndSuffixTolerantSet
add unit tests, write JavaDoc
Merge branch 'feature/refactor_VerificationHashSet' into develop