Sub-blocking
- Major new features include addition of sub-block hierarchy between blocks and vector-clusters.
- Added ability to provide default cmd-line options in the Makefile. This is much more expressive and flexible than the old way of setting a few macros.
- Updated the example recipes and results for KNL, BDW, and HSW architectures.
- Make it easier to copy settings from the stencil-tuner back into the Makefile.