use toolz to check for dbsnp key
update SnpEff value for yeast
disable vqsr for non-human
Merge pull request #464 from kern3020/master

Modifications to enable non-human run
Small cleanups for #464: add missing parenthesis, whitespace fixes, and simplify dictionary retrieval
Ensure cn.mops samples are correctly extracted when R make.names converts characters. Fixes #462
Document setting user process limit for dealing with open file handle issues: #457
Add link to Luca's poster on using bcbio for ovarian cancer sequencing
Add link to Luca's poster on using bcbio for ovarian cancer sequencing
Improve memory utilization with joint calling by assigning less to main process. Write inputs to list file to make debugging of large runs easier
Handle input metadata with empty information. Fixes #469. Fix typo in hg19 ensembl name. Fixes #467