Bump to v0.2.1
Bump to v0.2.1

hammerlab/pileup.js,hammerlab/pileup.js,piotr-gawron/pileup.js,snaheth/pileup.js,piotr-gawron/pileup.js,piotr-gawron/pileup.js,snaheth/pileup.js,piotr-gawron/pileup.js,snaheth/pileup.js,snaheth/pileup.js,hammerlab/pileup.js,hammerlab/pileup.js