Add ApolloModule

[kamilkisiela]

• add to changelog
• v0.4.2 to be released

Requires @angular/core^2.0.0-rc.5

Usage:

import { ApolloModule } from 'angular2-apollo'; 

import { NgModule }       from '@angular/core';
import { BrowserModule  } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppComponent }   from './app.component';
import { client } from './client';

@NgModule({
    declarations: [ AppComponent ],
    imports:      [
        BrowserModule,
        ApolloModule // or ApolloModule.withClient(client)
    ],
    bootstrap:    [ AppComponent ],
})
export class AppModule {}

platformBrowserDynamic().bootstrapModule(AppModule);

[kamilkisiela]

Closes #61