Refactor Results out of Ninja.java

[raphaelbauer]

Currently Ninja.java contains methods that generate default results. But the scope of Ninja.java is actually different (it's more a lifecycle of request / framework class).

We should fix that and make responsibilities more clear.

Ideas: NinjaRequestLifecycle.java => all onRequest / onException methods NinjaFrameworkLifecycle.java => all onFrameworkStart / onFrameworkStop methods NinjaResults.java => all getXYZResult methods

But that's just an idea...