Build worker with browserify.
BAMs work with modularized worker.
Mostly-working browserify build of main code.
Binary file probe and a few other things working again.
All supported browsers have had native JSON for a long time now.
Install jszlib via NPM.
More fixes.
Remove erroneously-commited files.
Fix SVG export.
Tests work with CommonJS modules.
(Currently requires https://github.com/xdissent/karma-browserify/pull/31)
CommonJS-ed remaining modules.
Tabix works again.
(Mostly) fixed compiling.
Merge branch 'browserify'

Conflicts:
	js/bam.js
	js/bigwig.js
	js/tabix.js
	js/vcf.js
Updates.