feat(svg): add support for SVG fragment identifiers
feat(svg): add support for SVG fragment identifiers

See #459

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