Don't install dev requirements by default.
Don't install dev requirements by default.

Ghalko/waterbutler,chrisseto/waterbutler,kwierman/waterbutler,TomBaxter/waterbutler,CenterForOpenScience/waterbutler,hmoco/waterbutler,rafaeldelucena/waterbutler,cosenal/waterbutler,felliott/waterbutler,icereval/waterbutler,Johnetordoff/waterbutler,rdhyee/waterbutler,RCOSDP/waterbutler