Adding custom tar.gz

Adding a custom *.tar.gz for addition to Spack.

Initial release having basic and some sophisticated loop scheduling functionality

This is an initial release of a loop scheduling library. The library has a function that schedules an OpenMP loop based on OpenMP static schedule and a function that schedules an OpenMP loop based on the OpenMP dynamic schedule. The library also has three functions that schedule an OpenMP loop using three sophisticated scheduling strategies that aren't based on available schedules in the OpenMP.