Implemented new Editor Option: CodeMirror. (Vim mode not 100% done yet)

package.json

@@ -15,6 +15,7 @@
     "autosize": "^4.0.2",
     "bluebird": "^3.5.1",
     "brace": "^0.11.1",
+    "codemirror": "^5.43.0",
     "decimal.js": "7.2.3",
     "enhanced-resolve": "^4.0.0",
     "escodegen": "^1.11.0",
@@ -22,6 +23,7 @@
     "file-saver": "^1.3.8",
     "interpret": "^1.0.0",
     "jquery": "^3.3.1",
+    "jshint": "^2.9.7",
     "json-loader": "^0.5.4",
     "jsplumb": "^2.6.8",
     "jszip": "^3.1.5",