[mod] simple theme: add the license to different files.

searx/static/themes/simple/css/searx-rtl.css

-/*! searx | 06-08-2017 | https://github.com/asciimoo/searx */
+/*! searx | 26-11-2017 | https://github.com/asciimoo/searx */
 /*
 * searx, A privacy-respecting, hackable metasearch engine
 *
     width: 100%;
   }
 }
+/*! Autocomplete.js v2.6.3 | license MIT | (c) 2017, Baptiste Donaux | http://autocomplete-js.com */
 .autocomplete {
   position: absolute;
   max-height: 0;

searx/static/themes/simple/css/searx.css

-/*! searx | 06-08-2017 | https://github.com/asciimoo/searx */
+/*! searx | 26-11-2017 | https://github.com/asciimoo/searx */
 /*
 * searx, A privacy-respecting, hackable metasearch engine
 *
     width: 100%;
   }
 }
+/*! Autocomplete.js v2.6.3 | license MIT | (c) 2017, Baptiste Donaux | http://autocomplete-js.com */
 .autocomplete {
   position: absolute;
   max-height: 0;

searx/static/themes/simple/gruntfile.js

     uglify: {
       options: {
         banner: '/*! simple/searx.min.js | <%= grunt.template.today("dd-mm-yyyy") %> | https://github.com/asciimoo/searx */\n',
-        preserveComments: 'some',
+	output: {
+	    comments: 'some'
+	},
         sourceMap: true
       },
       dist: {

searx/static/themes/simple/less/autocomplete.less

+/*! Autocomplete.js v2.6.3 | license MIT | (c) 2017, Baptiste Donaux | http://autocomplete-js.com */
+
 @background_color:  white;
 
 .autocomplete {