COMP: MetricImage signed/unsigned integer comparison.
COMP: Set CMP0026 for Tuner configure_file.

Comes up when using CMake master (to be 3.0).
STYLE: No extra newline in virtualenv packages CMake status.

To be consistent with the rest of the output.
BUG: Do run ParameterSerializer-based tests with TubeTK_USE_SLICER.

Until Slicer has that feature upstream.
BUG: Launcher/UNIX/Slicer logic inverted.

The launcher is not desired with UNIX/not Slicer to avoid false positives with
valgrind.
BUG: Do not set/restore OLD_PATH in TubeTKLauncher.sh.

It is never used.
Merge pull request #224 from thewtex/deserialize-slicer

BUG: Do run ParameterSerializer-based tests with TubeTK_USE_SLICER.
BUG: Only set CMP0026 for CMake greater that 2.8.12.
Merge pull request #223 from thewtex/signed-unsigned

Signed unsigned comparison warnings and extra
Merge pull request #225 from thewtex/memory-leak

Memory leak false positives