Added option in HTMLFeatures for subclasses to set the minimum size of a rendered feature.
Changing default settings in DraggableHTMLFeatures for style.minSubfeatureWidth, style.alwaysDrawArrow, and minFeatWidth to make rendering similar to previous versions of WebApollo.
Fixed start coord off-by-one error GFF3 parsing.
Cleaning up WebApollo CSS, nothing really left in genome.css (remove soon?)
Redid _centerFeatureElements in DraggableHTMLFeatures.  Needed recursion into child elements to center all descendants.  Could probably move up into HTMLFeatures._centerFeatureElements ?
Also adding default classnames "webapollo-CDS", "webapollo-UTR" to computed CDS/UTR divs.
Just changing so sequence measurements are based on "wa-sequence" CSS class.
Turned off auto-centering of feature div children for AnnotTrack.
Fixed bug in HTMLFeatures.getFeatDiv when block has no featureNodes.
Refactored initialization of FeatureEdgeMatchManager, moved initialization of FeatureSelectionManagers and FeatureEdgeMatchManager into WebApollo main.js
Partly motivated by problems getting class variable inheritance working smoothly in HTMLFeatures -> DraggableHTMLFeatures -> (WebApollo)Alignments hierarchy.
make the safari cache bug workaround use the byte range itself rather than the date
change signature of track fillBlock method to be named args
publish a /jbrowse/v1/n/navigate message notifying of changes in navigation
Fixed a few issues.
Merge branch 'jbrowse_1.7' of github.com:berkeleybop/jbrowse into jbrowse_1.7
Allow numbers in css class names
Getting BAM subfeature creation based on CIGAR working to support subfeature rendering.
Getting subfeature rendering working in Alignments.  Also adding style options renderSubfeatures, renderMismatches.  Alignments now inherits from DraggableHTMLFeatures, plan to refactor soon to take DraggableHTMLFeatures out of Alignments and make a DraggableAlignments that is a mixin of Alignments and DraggableHTMLFeatures.
Start of WebApollo CSS styles overhaul
Merge branch 'jbrowse_1.7' of github.com:berkeleybop/jbrowse into jbrowse_1.7
improve loading feedback by having BlockBased put a Loading mask up when a track starts working on a block, and adding a finish-callback that should be called when the block is done drawing to remove the mask