[pdal] CMAKE_LIBRARY_OUTPUT_DIRECTORY and Windows

[Howard Butler]

Brad,

I saw on IRC that you were asking about CMAKE_LIBRARY_OUTPUT_DIRECTORY being set to PROJECT_BINARY_DIR/bin. Mateusz may have some CMake history to know what we should really be doing on for these variables. I do know that it is convenient on *nix to keep the .libs and apps in the /bin dir for running tests and such without having to manually set paths. I'd like to keep that capability if possible in whatever we do.

Thank you for doing the windows cleanups. Please feel free to merge in any and all of your pull requests that touch up all these issues.

Howard