removes snoflwake tex linting, and lints examples

fixes facebookarchive#536

this removes the special tex example linting. that had it's own
copy of eslint linting just itself. after removing eslint i removed
dependencies i didn't see were being used. after that it failed to
build, not reconizing the jsx/import statements. so i added the two
babel presets to handle that. (react, and es2015 presets).

next this starts linting the `examples/` directory. this should
introduce no new warnings/errors. as only the tex example had two
things that didn't comply (trailing commas, which have been fixed).

.eslintignore

@@ -1,6 +1,5 @@
 lib/
 dist/
 docs/
-examples/
 node_modules/
 website/

examples/tex/package.json

@@ -6,12 +6,9 @@
   },
   "dependencies": {
     "babel": "5.8.23",
-    "babel-eslint": "^4.1.3",
-    "babel-loader": "5.3.2",
-    "classnames": "^2.1.3",
-    "eslint": "^1.0.0",
-    "eslint-loader": "^1.0.0",
-    "eslint-plugin-react": "^3.2.0",
+    "babel-loader": "^6.2.4",
+    "babel-preset-es2015": "^6.9.0",
+    "babel-preset-react": "^6.11.1",
     "express": "^4.13.1",
     "immutable": "^3.7.4",
     "katex": "^0.5.1",

examples/tex/server.js

@@ -22,19 +22,15 @@ const APP_PORT = 3000;
 // Serve the TeX Editor app
 var compiler = webpack({
   entry: path.resolve(__dirname, 'js', 'app.js'),
-  eslint: {
-    configFile: '.eslintrc',
-  },
   module: {
     loaders: [
       {
         test: /\.js$/,
         exclude: /node_modules/,
         loader: 'babel',
-      },
-      {
-        test: /\.js$/,
-        loader: 'eslint',
+        query: {
+          presets: ['es2015', 'react'],
+        },
       },
     ],
   },