Use externap package for entities data

package.json

@@ -19,6 +19,7 @@
   },
   "dependencies": {
     "argparse": "~ 1.0.0",
+    "entities": "~ 1.1.1",
     "linkify-it": "~ 0.1.2",
     "mdurl": "~ 1.0.0",
     "uc.micro": "~ 0.1.0"

support/entities.js

@@ -1,51 +0,0 @@
-#!/usr/bin/env node
-
-//
-// Markdown entities generator (from html5 entities)
-//
-'use strict';
-
-/*eslint no-console:0*/
-
-
-var http = require('http');
-
-function codeToUni(code) {
-  var result = code.toString(16).toUpperCase();
-  while (result.length < 4) { result = '0' + result; }
-  return '\\u' + result;
-}
-
-function strToUni(str) {
-  var result = codeToUni(str.charCodeAt(0));
-  if (str.length > 1) {
-    result += codeToUni(str.charCodeAt(1));
-  }
-  return result;
-}
-
-http.get('http://www.w3.org/TR/html5/entities.json', function (res) {
-  var body = '';
-  res.on('data', function(chunk) {
-    body += chunk;
-  });
-  res.on('end', function() {
-    var entities = JSON.parse(body);
-    var out = {};
-
-    Object.keys(entities).forEach(function (entity) {
-      // Skip legacy - not allosed in markdown
-      if (entity[entity.length - 1] !== ';') { return; }
-
-      out[entity.slice(1, -1)] = strToUni(entities[entity].characters);
-    });
-
-    var result = [];
-
-    Object.keys(out).forEach(function (key) {
-      result.push('  "' + key + '":"' + out[key] + '"');
-    });
-
-    console.log('{\n' + result.join(',\n') + '\n}');
-  });
-});