Speedup execution of benchmarks, already generated simngs reads do not need to be regenerated. Solved OMP_NUM_THREADS in benchmarks by passing -P flag to nosetests (preserve environment variable) @guillermo-carrasco #reviewthis
Merge pull request #102 from brainstorm/master

Contamination rates for fastq_screen corrected
Merge branch 'master' of https://github.com/SciLifeLab/facs
Multithreading benchmarks for fastqscreen based on OpenMP environment variable