ts-loader's default config makes Webpack extremely slow in larger projects

The nature of ts-loader makes it slower as the project's size increases.
https://github.com/TypeStrong/ts-loader#faster-builds

There are 2 options to make it fast:

- Use a separate process for typechecking, following `ts-loader`'s docs in the link above:
```
var ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
[ ... ]
module: {
rules: [{
test: /\.ts$/,
loaders: [{
loader: 'ts-loader',
options: {
transpileOnly: true
}
}, 'angular2-template-loader']
},
[ ... ].
plugins: [
new ForkTsCheckerWebpackPlugin(),
[ ... ]
```

- Use `awesome-typescript-loader`:
```
[ ... ]
module: {
rules: [{
test: /\.ts$/,
loaders: ['awesome-typescript-loader', 'angular2-template-loader']
},
[ ... ]
```

Any inputs on if these changes breaks anything?