AppVeyor: Test against node.js v0.12 and io.js.
AppVeyor: Test against node.js v0.12 and io.js.

leornado/grunt-usemin-wnd,trumbitta/grunt-usemin,audibene-em/grunt-usemin,trumbitta/grunt-usemin,rudasn/grunt-usemin,audibene-em/grunt-usemin,nqdy666/grunt-usemin,dlmiles/grunt-usemin,happynale/grunt-usemin,stephanebachelier/grunt-usemin,leornado/grunt-usemin-wnd,alippai/grunt-usemin,liorsion/grunt-usemin,andreskir/grunt-usemin,blighli/grunt-usemin,liorsion/grunt-usemin,dlmiles/grunt-usemin,blighli/grunt-usemin,TrevorS/grunt-usemin,yeoman/grunt-usemin,rudasn/grunt-usemin,yeoman/grunt-usemin,happynale/grunt-usemin,andreskir/grunt-usemin,TrevorS/grunt-usemin,alippai/grunt-usemin,stephanebachelier/grunt-usemin,nqdy666/grunt-usemin