Build: Update license

Closes gh-53

Author: scottgonzalez

LICENSE-MIT

@@ -0,0 +1,37 @@
+Copyright 2012, 2014 jQuery Foundation and other contributors,
+https://jquery.org/
+
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/jquery/grunt-jquery-content
+
+The following license applies to all parts of this software except as
+documented below:
+
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+All files located in the node_modules directory and
+tasks/jquery-xml/xml2json.xsl are externally maintained libraries used
+by this software which have their own licenses; we recommend you read
+them, as their terms may differ from the terms above.

LICENSE.txt

@@ -16,7 +16,7 @@
   "licenses": [
     {
       "type": "MIT",
-      "url": "https://github.com/jquery/grunt-jquery-content/blob/master/LICENSE-MIT.txt"
+      "url": "https://github.com/jquery/grunt-jquery-content/blob/master/LICENSE.txt"
     }
   ],
   "main": "grunt.js",