a couple of comment tweaks
test DiskBackedQueue switching to read-only mode
Added an option to VCFWriter to write the entire FORMAT field, even if the trailing values are missing and could therefore be trimmed.  Also fixed ParsingUtils.split() to correctly handle the case where the only delimiter is the first character
Removed license file; it seems like adding a license is a good suggestion, but it shouldn't be part of this pull request.
Added reasonable version ranges to mitigate potential version conflicts. When the build fails due to minor, generally backwards-compatible version increments, the better solution would be to figure out why it fails and to fix it (e.g. for snappy-java). Feel free to tighten or expand these ranges.