Increase output precision for small model

Also remove results for rel.perm of oil which are not used
Merge pull request #7 from laods/cmake

Build release library by dafault
Edit small input model so that ZCORN is strictly nondescreasing along pillars

This prevent warning message to be printed when calling upscale_relperm
Merge branch 'zcorn_nondecr' into cmake

Conflicts:
	benchmarks/input/benchmark20_input_data.cpp
Edit model name of small model
Merge pull request #8 from laods/zcorn_nondecr

Changes to small input model
Fix segmentation fault when running multithread

Redirect unwanted output to a stringstream rather than /dev/null,
which has caused segmentation faults.

Also, progress asterixes are removed as they did not work as supposed to.
Merge pull request #9 from laods/fix_segfault

Fix segmentation fault when running multithread