Handle downloads of docs files.
Handle downloads of docs files.

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