from tapeserver/daemon to common directory

Created a new class ConfigurationFile that turns a text file into a double map of categories/keys entries.
The map also contains the line number from which the configuration is comming.

License comment is no longer filtered out by doxygen when generating web pages of the individual source files.

Created AdminUsersList in the object store as a first step to implement an object store middle tier.
Some namespace fixes for unit tests.

Implemented the new interface on the Rados backend.
Fixed several bugs.