* Change path to CMakeLists.txt to be relative to root, not pwd
* Changes requested during code review
* Revert back to old naming of root_cmakelists_dir
* Make relative directory more clear in docs
* Revert change causing build_type AttributeError
* Fix forgotten abs_path var
* Update CLHEP with new relative path
* Update more packages with new root_cmakelists_dir syntax
Adds the `gearshifft` package, a benchmark suite for heterogeneous implementations of FFTs.
Adds clFFT, a software library containing FFT functions written in OpenCL.
see: https://github.com/clMathLibraries/clFFT
