Use build id to name vcfs. This keeps file names unique between exome/wgs
Stop using patient counter in vcf name. Use vcf_suffix instead, default to build id.
Updated capture reagent hash. Now dynamically generated.

There are no longer hardcoded '+' combinations of capture sets, rather
the pieces are assembled dynamically.
Test a capture reagent with multiple sub-parts
Fix test data
Remove unused probe_file
Merge pull request #270 from gsanders/tcga

Tcga metadata update