BUG: Install rule was wrong on linux. It was trying to install FiberView...

...erLauncher which is build only on Mac and Windows. We added an "if endif" for that rule in CMakeLists.txt

ENH: Remove Slicer_SKIP_PROJECT_COMMAND that is not necessary anymore
BUG: addition of Subversion_SVN_EXECUTABLE to be passed to the sub-projects (Slicer r22241[1])
https://www.nitrc.org/plugins/scmsvn/viewcvs.php?view=rev&root=fvlight&revision=60