Corrected the functors in Joseph Forward and Back projectors
Removed some macros that kept compatibility with ITK3, for all
files except the FFTW-related ones.
Set number of threads in mini-pipeline
Removed the macros and the utilities that were used to ensure compatibility with ITK 3
Added Doxygen linking to ITK's Doxygen, so that clicking on an ITK filter in
a pipeline diagram will redirect to ITK's nightly build Doxygen. This
last feature requires GZIP and is currently only available on UNIX
builds. Another tool can be used (by modifying the CMakeLists) on
other platforms.
Cosmetic
No need to unzip tag file
Merge branch 'ITK4'