feat(upgrade): add support for AOT via '@angular/upgrade/static' api

[Hotell]

• add new super powers for hybrid ng1/ng2
• don't need to create new opaque tokens for downgrade ng2 services, just decorate the service with ngMetadata @Injectable and everything will work == even less refactoring during migrating to ng2 ! yay!
• @Input,@Output are automatically determined for you so you don't have to specify them within downgradeComponent function
• add convenient helper for upgrading ng1/ngMetadata services to ng2 via upgradeInjectable
• allow easily upgradable ngMetadata @Injectable services to ng2 via upgradeAdapter.upgradeNg1Provider

All new API's are available under ng-metadata/upgrade module namespace

Closes #178

[Hotell]

TODO:

• [x] add tests