Support "gene" features that have "transcript" subfeatures.
Support gene features that have a transcript subfeature in
Bio::Graphics::Glyph::rainbow_gene as well.
Fix label padding for gene features with *RNA subfeatures other than mRNA.
If left labeling requested and the selected font size is larger than the available height, then go to smallest available font (gdTinyFont).
Merge branch 'master' of github.com:GMOD/Bio-Graphics
potential fix for messed up group feature labeling
Revert "potential fix for messed up group feature labeling"

This reverts commit 77f41be91516a75ebf041fec50861d08af5e3d29.
real fix for confusing labeling problems
Turn off image-based regression tests becuase libgd has started to produce visually-identical images that are different at the byte level.
Merge pull request #17 from nathanweeks/gene_transcript_fix

Support gene features that have transcript/ncRNA sub features.  Thanks for this Nathan!