use options.outputHash to trigger [hash] in name of css and woff files (as is done in js files)
use options.outputHash to trigger [hash] in name of
css and woff files (as is done in js files)

closes #1001
onaio/kpi,onaio/kpi,kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi,onaio/kpi,onaio/kpi