CHANGELOG VEP will always print gene symbol

The --hgnc parameter will be ignored, and vep will always
be asked to print the gene symbol, if available.  In versions
pre-74, the --hgnc parameter will always be appended to the
vep command.  In 74+, the --symbol parameter replaced --hgnc
and will always be appended to the vep command.
Merge branch 'my_annotation' into gb_master