Partial commit (much more to come).

This is a work in progress, so not everything is expected to be working. We are in the middle of a major refactorization of structWSF.

Refactoring steps in this commit:

 (1) New validation mechanism using API keys
 (2) Validation is not performed within each WebService endpoint
 (3) Deprecation/removal of the Auth: Validator endpoint
 (4) Creation of a new Auth: User endpoint
 (5) Creation of a new Auth: Group endpoint
 (6) Updating of the Auth: Lister endpoint
 (7) Removal of the Logger and disabling endpoint logging
 (8) removing the wsf_indexer.php file (will be available in the OSF-Installer tool)
 (9) Removal of the bibtex Converter
 (10) removal of the tsc converter