better error messages and --sample-exprs

v0.1.0

• allow accessing INFO via variant.INFO as well as INFO
• better error message on missing gnotate file
• add --sample-expr to slivar expr sub-command to allow applying an expression to each sample:
  --sample-expr "hi_quality:sample.DP > 10 && sample.GQ > 20"
• expose samples in javascript in $S object, e.g. $S["sampleABC"].DP > 10 && $S["sampleXYZ"].DP > 10

binaries and annotation files

There are 2 binaries for this release. Both are 64bit linux binaries.

• slivar_static is a completely static binary. you can download it and use it without any other software. This is the recommended binary. You can wget, chmod +x and start analyzing.
• slivar_shared depends on a libhts.so. it has the advantage of allowing access to files on s3 or https if that is needed.

users can also use slivar via docker at brentp/slivar:v0.1.0

the gnotation files for fast annotation remain unchanged.
Users can create their own gnotation files with slivar make-gnotate, but we provide:

• gnomad for hg37 with AF popmax, numhomalts (total and controls only) here
• gnomad for hg38 with AF popmax, numhomalts (total and controls only) here
• spliceai scores (maximum value of the 4 scores in spliceai) here