fixes from branch-vega-14
new common glyphset for density histograms in mapview
displaying polymorphic genes
fixed scaling
removed obsolete glyphsets
moved dynamic use to new Sanger::Graphics::Root module
added an __init function so that the ensembl version can perform eproffing
added extra bump functionallity which takes a max bump depth
added functionality to VD to draw multiple tracks for multiple chromosomes
added code to allow to draw on multi-chr display
added code so match tracks do not fail
added extra bump functionallity which takes a max bump depth
added default colour
removed use Bump
drawingcode fixes
fixed genefinder/snap fasta links
rationalizing (now inheriting from GlyphSet_transcript.pm)
add temp fix for db type for flybase genes
corrected vega portion of db type fix from rev. 1.11
adapted to work with vega