Text Extractor registry: bugfixes, and refactoring, and added getter methods, with exceptions
AbstractExtractor: bugfix, duplicate variable declarations
Fixed ODT text extractor: was not implemented correcly at all! Also enabled .ott extension
Text Extractor: added dump .txt extractor
App Core base: added support for setting locale
Added validator to parse and compare to regex document content
Added PDF text extractor, and suggested pdfparser as soft dependency here
Doc text extractor: fixed, made it very simple!