Update CMake scripts in tutorials (remove superfluous include_directories et al. calls)

[SergioRAgostinho]

I was thinking about the CMakeLists in tutorials, do they need to be updated as well? My conclusion was no, not yet. It should still be possible to use PCL in downstream projects with old CMake. But once we switch to C++14 we should consider bumping version there and requesting CXX_14 explicitly.

Originally posted by @taketwo in #2605 (comment)

[taketwo]

CXX_14 is requested automatically through target compile options. What we may want to do at some point though is remove unnecessary:

include_directories(${PCL_INCLUDE_DIRS})
link_directories(${PCL_LIBRARY_DIRS}) 
add_definitions(${PCL_DEFINITIONS})

I'm hesitant to do it now because this will break compatibility with pre-1.9 versions. So someone who obtained an older PCL through agt-get and then looked up an (updated) tutorial on the website won't be able to successfully compile.

Edit: removing this from migration project.

[stale]

Marking this as stale due to 30 days of inactivity. It will be closed in 7 days if no further activity occurs.