Updating to y2.8

- Deletions are correctly represented as `-` in the matrix instead of `*` (bug introduced in v2.7)

Fix bug introduced with `-w`

Updating to v2.6

Added support for GVCF from GATK
Added option to redirect output to a specific folder
Added option to rename the prefix of the output matrices
Improved error catching for malformed lines in VCF

Fixed issue when reference nucleotide is in lower case

Update to v.2.3

Fixed bug when opening gzipped files in python 3

Update vcf2phylip to v2.0

Updated version number to 1.5