Proper closing of file descriptors in bloom.c.
Merge pull request #123 from okulev/master

Proper closing of file descriptors in bloom.c.
Build bowtie2 indexes if not found. Merge run_fastq_screen tests
Download reference data if not available. Fixe #121
Merge branch 'master' of https://github.com/SciLifeLab/facs into bowtie2_indexes
Merge pull request #125 from guillermo-carrasco/bowtie2_indexes

Build Bowtie2 indexes