fix bug where the number of distinct readids allowed was very low
use libraryId=0 when it's not available from the filename (rather than error)
Merge pull request #102 from uci-cbcl/wbiesing/fix-graphbuild-library-ids

Wbiesing/fix graphbuild library ids
Merge branch 'genomix/fullstack_genomix' into anbangx/fitting-mixture-model