Support gnomADe AFs; Updated tests; Abandon Travis

Update MAF column specs since filter-vcf arg is removed

maf2maf: Remove only one anchor bp if found, not all of them

Disable filter-vcf by default; update fasta path; better notes

Fix maf2maf by using vcf2maf with inhibit-vep arg

Use DP4 for allele counts when AD is missing

Use buffer-size to limit CLI args for samtools/tabix

Fix tabs for empty MAF columns before newline

Fix: VCFs need semicolon delim FILTER data, and header lines

Support un-normalized input VCFs