chore(aot-cookbook): gitignore gen'd css and skip rollup warn on 'this'

public/docs/_examples/cb-aot-compiler/ts/.gitignore

@@ -1,5 +1,6 @@
 **/*.ngfactory.ts
 **/*.ngsummary.json
+**/*.shim.ngstyle.ts
 **/*.metadata.json
 dist
 !app/tsconfig.json

public/docs/_examples/cb-aot-compiler/ts/rollup-config.js

@@ -10,6 +10,17 @@ export default {
   dest: 'dist/build.js', // output a single application bundle
   sourceMap: false,
   format: 'iife',
+  onwarn: function(warning) {
+    // skip certain warnings
+
+    // Should intercept ... but doesn't in some rollup versions
+    if ( warning.code === 'THIS_IS_UNDEFINED' ) { return; }
+    // Intercepts in some rollup versions
+    if ( warning.indexOf("The 'this' keyword is equivalent to 'undefined'") > -1 ) { return; }
+
+    // console.warn everything else
+    console.warn ? console.warn( warning.message ) : console.log( warning.message ) ;
+  },
   plugins: [
       nodeResolve({jsnext: true, module: true}),
       // #docregion commonjs
@@ -22,4 +33,4 @@ export default {
       // #enddocregion uglify
   ]
 }
-// #enddocregion config
+// #enddocregion config