Sort results by Levenshtein distance from the requested name

I noticed that searching for `name=jquery*` on CDNJS did not return jQuery as the top result, or even in the top 100 results!
http://api.jsdelivr.com/v1/cdnjs/libraries?name=jquery*&limit=100&fields=name

This sorts the results (before a limit is imposed) based on the [Levenshtein distance](https://en.wikipedia.org/wiki/Levenshtein_distance) between the package name and the requested name (it would probably muss up a bit if one was to go nuts with the minimatch syntax).

Before (`name=jquery*&limit=4&fields=name`):

    [
      {
        "name": "jQuery-Geolocation"
      },
      {
        "name": "jQuery-Validation-Engine"
      },
      {
        "name": "jQuery-slimScroll"
      },
      {
        "name": "jQuery.dotdotdot"
      }
    ]

After:

    [
      {
        "name": "jquery"
      },
      {
        "name": "jqueryui"
      },
      {
        "name": "jquery-te"
      },
      {
        "name": "jquery.pep"
      }
    ]