Import sam_buff_t class and VCF functions from ad2vcf
Add BED and GFF support
Isolate headers under include/biolibc
Numerous small enhancements and fixes
Upstream change log: https://github.com/auerlab/biolibc/releases
Biolibc is a library of fast, memory-efficient, low-level functions for
processing biological data. Like libc, it consists of numerous disparate,
general-purpose functions which could be used by a wide variety of
applications. These include functions for streaming common file formats such
as SAM and VCF, string functions specific to bioinformatics, etc.