Added a sourced parameter which keeps track of the origin of a parameter.
Ported parsing of configuration files from CASTOR.

added authorization for administrative commands and removing security identity parameters from deleters and getters of the catalogue

added to the interfaces the features requested by Vlado: label/lastwrite/lastread logs, encryption key and lbp tag for tapes; and encryption flag for pools

Added new make targets for helgrind and valgrind.