Eclipse CDT project support

The dedupv1 can now be opened as CDT project within Eclipse.
To use it, download eclipse for C++. Extend it with pydev
(http://pydev.org/manual_101_install.html) To get python
support.

Signed-off-by: Dirk Meister <meister@uni-mainz.de>
Repaired Eclipse project, so the logging header files are displayed correctly.

Signed-off-by: Dirk Meister <meister@uni-mainz.de>
CRCs are now computed by crcutil, which uses SSE 4.2.

Applied with changes

Signed-off-by: Dirk Meister <meister@uni-mainz.de>
Fix installation of crcutil on some machines.

Signed-off-by: Dirk Meister <meister@uni-mainz.de>
Fix block chunk cache print trace
Add an option to execute the filter chain for a request serially.

The default is still the threadpool-based parallel filter chain
execution.
Adds a basic performance test case to dedupv1

In this test case, two 128 GB files are copied from a different
node using iSCSI.
Remove the system test configuration from internal machines
Fix the order in which python files are included in dedupv1_util.

The files in /opt/dedupv1/lib should overrule files in the system
directories. This has not been an issue in the previous tightly
controlled installations, but it will become in issue in the future.

Furthermore a ton of trailing whitespaces are removed.
Remove trailing whitespaces from a file.
Removes the sparse filter, the sampling is now in the chunk index.

The problem with the sparse chunk index filter is that various other
components need to know if the chunk index is sparse or not, e.g.
the crash recovery and the garbage collector.