fix some more dojo 1.8-related styling issues
in-passing cleanup
upgrade to dojo 1.8.3, forgot to fetch tags before
add a "Primary Data" section title to the default feature detail dialog
in SNP coverage track, don't widen and offset the SNP canvas.  causes problems at block junctions.
make modencode example trackList.json more strict JSON
update quick-start tutorial
delete "Perl prerequisites" from the tutorial, people should just run setup.sh again
more tutorial updates
remove references to bam-to-json.pl from the tutorial
more tutorial updates.  removed most references to wig-to-json.pl, replacing with a paragraph suggesting that users convert their wiggle files to BigWig for display, and linking to the wiki page about wig-to-json.pl