BUG: Only use launcher with TubeTK_USE_SLICER.

When run with valgrind during the CTest check, every test gets about 10 false
positives from the shell executable.

Only use the launcher with TubeTK_USE_SLICER.
Merge pull request #204 from thewtex/unix-launcher

BUG: Only use launcher with TubeTK_USE_SLICER
COMP: Bump CTK version.

Fix warnings with CMake 2.8.12.

Sync with Slicer.
BUG: Fix launcher PATH munging on Windows.

The launcher script is needed on Windows even with TubeTK_USE_SLICER OFF.

CMAKE_BUILD_TYPE is not used with Visual Studio builds. CMAKE_BUILD_TYPE is not
in the output path when using a Generator like Ninja. Make the path munging
include the common Debug and Release directories for Visual Studio and none for
Ninja (Ninja is to be tested).

Change-Id: Ib2c23e2c20df660844965d7428eca18222f7e20d
Merge pull request #205 from thewtex/CTK-bump

COMP: Bump CTK version.
Merge pull request #206 from thewtex/windows

BUG: Fix launcher PATH munging on Windows.