This was failing in SLC5. The default is now 0/0 insteadof
-1/-1  for major/minor in the device list.

Added support for TPconfig, looking for drive and density.
Improved logging and error situations handling.

This is achieved with an extra setup function.

We now support a new "model" of drives called virtual. This will allow
auto-detection of drives in fake environement, for unit tests.
Changed accordingly the signature of the reference returned by the Drive
wrapper from DriveGeneric to DriveInterface
Also fixed the order of the parameters of setDensityCode, to allow the usage
of the default densityCode.

Added a small section on how-to compile catsor on SLC and possible issues which can be faced while doing so

Exception is now catch by const-ref instead of a copy, message has been improved and move from string::find to string::substr to make sure the file is well formated

The DriveCatalogue::enterDrive() method has been superseded by the
DriveCatalogue::populateCatalogue() method.  I have therefore
removed the now unused DriveCatalogue::enterDrive() method.

The contents of the tape drive catalogue can now be populated by
passing it the parsed lines of /etc/castor/TPCONFIG.

We are now using the matching files and classes frpm castor/tape/threading

One was requiered because castor::tape::Exception asks for std::string in his constructor

More it from std::exception to castor::tape::Exception

TpconfigLine is a struct and therfeore its member variables should
not have the m prefix.

The tape server now makes sure that /etc/castor/TPCONFIG neither
defines multiple DGNs nor multiple initial states for the same
tape drive.

The TpconfigLine structure would not allow you to call its constructor with
string literals.  This commit removes this unwanted limitation.

BlockingQueue.hpp has been reformated a little bit and I fixed stupid error in the UT

in a dev branch and should have made it earlier to the official one...

in a dev branch and should have made it earlier to the official one...