Removed linking information for external libraries from CASTOR.
Started to re-import necessary files from CASTOR.
Edited files from CASTOR to replace usage of the old Cxxx compatibility layer (this was for multi-system
compatibility at the time.

Please note that you will have to install the following CASTOR rpms
in order to compile:

  castor
  castor-devel
  castor-lib
  castor-lib-server
  castor-lib-tape

Renamed CTA/tapeserver/castor to CTA/tapeserver/castor_checkout in preparation for the moving the sub-directory CTA/tapeserver/castor/castor up the directory tree

Fixed.

Removed "h/" from all #includes.

To forcefully dismount a tape means to rewind and eject the tape
where necessary.  This modification adds the ability to force dismount
to the MediaChangerFacade and the CASTOR acsd daemon.

This unfortunate move is necessary because the error/exception
handling of rmcd is done using the TCP/IP connection with the
client.

CASTOR-4772 The code to parse the name of a slot in a tape library should be implemented in one place

Added TapeLibraryType and TapeLibrarySlot.

The exception class named castor::exception::Exception provides the same
functionality as castor::exception::Internal and therefore one of them
had to go for the sake of removing redundant code.

The current rmcd daemon only does SCSI compatible actions.  The future
rmcd daemon will be able to do both SCSI compatible and ACS
compatible actions.  I have therefore added the SCSI qualifier to the
"old" rmcd message constants to differentiate them from the ACS
message constants.

In detail:

Renamed legacymsg::RmcProxyImpl to legacymsg::RmcProxyTpcIp
Renamed legacymsg::VdqmProxyImpl to legacymsg::VdqmProxyTcpIp
Renamed legacymsg::VmgrProxyImpl to legacymsg::VmgrProxyTcpIp
Renamed legacymsg::DummyVmgrProxy to legacymsg::VmgrProxyDummy
Renamed legacymsg::DummyVdqmProxy to legacymsg::VdqmProxyDummy
Renamed legacymsg::DummyRmcProxy to legacymsg::RmcProxyDummy

Bottom-line, if the concrete sub-class of a pure abstract class can have
a meaningful name without the need to use the Impl or Implemention
suffix then avoid using the suffix.

This commit also renames the "Dummy" proxy classes so that they are
easier to see when their source code directory is listed
alphabetically.

This commit also moves derived and supporting classes.

This commit can be considered another step towards removing the need for
a separate tape directory.