Added task options for prepend and append file wrapper strings. This is useful for creating custom AMD wrappers:
Added task options for prepend and append file wrapper strings.
This is useful for creating custom AMD wrappers:

    options : {
        prepend : "define(['dust'], function(dust){\n",
        append : "\n});
    }

aredridel/grunt-dustjs,grawk/grunt-dustjs-configurable,STAH/grunt-dustjs