added functions to retrieve and display vep api_version and app version

major upgrade - app uses vep api_version to look for available cache types (ensembl, refseq, merged) and disables any from selection if not available; results page displays api version and selected cache database; vep wrapper captures vep.pl stderr for display on results page; added vcf 'filter' col to results page; enabled HGVS notation function

moved forking config to config files - dev server faster without forks, deployment optimum with fork = 2; moved hires timer to immediately either side of vep script loop; deleted vep input file from /tmp if exists due to generation using append mode (in case previous run aborted before unlink) event; output format tweaks

fixed refseq selection function - required separate cache dir & use of --dir option

added 2 cols to VEP table (position in CDS and position in protein; added 12 new exons in ref table

adapted app for use in apache/plackup/starman environment, using Plack::Middleware::ReverseProxy

initial working project