Several optimizations based on profiling of 20M grid model. These fixes will improve the largest performance issues, but there are still more operations that can be refactored.
* OpenMP: Use in fault geometry generator
* OpenMP: Use when computing statistics for result values
* OpenMP: Use multithreading on fault detection
* Add RiaOpenMPTools
* VizFwk: Use openMP for texture generation
HDF5 must be compiled with special options to support multithreading. Disable file object multithreading for HDF5. Some vector types are not supported, as the support in opm-common reader is not complete (region, region_to_region, ...).