chore(grunt): use surround

[douglasduteil]

Following #134 and #133

Here is a fast implementation of what I mean.
Still we might use a real concatenation so we can test over the final result (don't know if it's really necessary...)

[thgreasi]

+1
Do we need to add a "strict": true property in .jshint file to be more explicit and make the grunt task find strict mode errors? I really can't recall the default value.