castor/utils/UtilsTest.

    castor::server::Daemon

Created a bare-bones tape session with corresponding harness in a unit test.
Successfuly retrives the volume id from a client thread.

Adapted the tape code.
Moved the Errnum unit tests and covered all the throwers.

Moved multi process tests into a new binary, as memcheck fails them (a lot of test framework related structures are still allocated at exit time).

Fixed inheritance from std::exception (const correctness of what()). This required declaring m_what mutable.
Created a multithreaded unit test.
Created an automatic exception thrower for unhandled errors.
Ported from previous proof of concept the threading primitves and made them production level (with error checking).
Added unit tests for threading primitives.

Fixed wrong COMPILE_SERVER default (now 1).
Added many man pages installations.
Created an empty placeholder libshift.c to prevent the confusion of cmake about this target (libshift is created by merely linking all of castor's libraries).
Moved more configuration files to the (debatable) config diretory (it is also used for compilation configuration).