Update find boost of cmake macro for support the latest versions

[UnaNancyOwen]

This pull request will update find_boost() cmake macro for support the latest versions (1.48.0 - 1.61.0) of boost.
In Addition, Automatically adds the boost version that was used when building the PCL to PCLConfig.cmake.
This change will facilitate future management.

[stefanbuettner]

👍 for adding the boost version with which PCL was compiled.
But why are all the other boost versions listed individually? Just curious.

[SergioRAgostinho]

@UnaNancyOwen Correct me if, I'm wrong. So the idea here is, if you provide the major, minor and subminor versions, these are selected first, otherwise it will try to grab the highest boost version of all the ones you've listed. Also, you've added the more recent boost versions to the list. Is this it?

Small remark: I don't think this PR is really worth three commits and would recommend to squash them into a single one.

[UnaNancyOwen]

I was squash the commits.

pcl_find_boost.cmake requires listed versions for find latest version.
PCLConfig.cmake basically requires find Boost that was used when building the PCL.
If it is not found, find latest version that listed in config file.

CMake can't find the new version than the versions that has been defined in FindBoost of CMake.
But, CMake can find the versions that are listed in the "Boost_ADDITIONAL_VERSIONS".
This change will prevents the problem that can't find Boost, when the user to use the old CMake.

What do you think?

[SergioRAgostinho]

I was squash the commits.

Thanks

pcl_find_boost.cmake requires listed versions for find latest version.
PCLConfig.cmake basically requires find Boost that was used when building the PCL.
If it is not found, find latest version that listed in config file.

So this one get's used by projects linking agains pcl. Makes sense to use the same version yes.

CMake can't find the new version than the versions that has been defined in FindBoost of CMake.
But, CMake can find the versions that are listed in the "Boost_ADDITIONAL_VERSIONS".
This change will prevents the problem that can't find Boost, when the user to use the old CMake.

Took me a while to realise that the FindBoost file you linked was in Kitware's CMake repo ^_^ So yes, this adds the latest Boost versions to old CMake versions the users might be running.

👍 Good to go for me. Will merge in a couple of days if no one opposes.