better performance fix for #269
Merge pull request #271 from dirkweissenborn/master

Better performance for #269.
Fixes Issue #273.
Integrating Dirk's fix of the encoding in WikipediaToDBpediaClosure + cleanup.
Activating confidence filter for the statistical backend.
Merge pull request #275 from dav009/fix-fsa-tokenizer

Fix for LanguageIndependentTokenizer bug caused by leading spaces
Changing hard-coded default values until somebody refactors the REST module.
Add spotter confidence value to Candidates.
adding tests