[UPD] CMake option BTK_EXTRA_COMPILER_WARNINGS works also with the Clang compiler.
Clang warnings: Unused variables.
Update the code of Open3DMotion to the commit c74cde4528 (part 1/2).
Update the code of Open3DMotion to the commit c74cde4528 (part 2/2).
Clang complains about signed/unsigned comparison.
Some unit tests failed under Linux 32-bit (compiled from a 64-bit machine) due to some round off errors. Adding the flag -ffloat-store solved most of the problems. The tolerance of one unit test had to be changed (from 1e-14 to 5e-14). It is not known if this fix is necessary if the code is built with a true 32-bit processor.
Update the code of Open3DMotion to the commit 21033cdb1a (part 1/3).
Update the code of Open3DMotion to the commit 21033cdb1a (part 2/3).
Update the code of Open3DMotion to the commit 21033cdb1a (part 3/3).
Copyright years updated.