New test and updated VCF header samtools command string
MWU correction for ties
stats: Removed unused stats code (NMQ)
mpileup: Updated to the latest htslib API; disabled tie correction in MWU for now, as the results look suspicious
mpileup: Updated to htslib vcf module changes
Resolved merge conflicts
Merge branch 'develop' of github.com:samtools/samtools into develop