docs(tutorial/step02): fix formatting
docs(tutorial/step05): fix formatting, use DI annotations in example code
docs(tutorial/step07): improve explanations, add note about ngRoute
docs(tutorial/step08): use DI annotations
docs(tutorial/step10): use DI annotations
docs(tutorial/step11): use DI annotations, fix summary
docs(tutorial/step12): summary link to closing notes
docs(tutorial/step07): explain injecting providers in callout
docs(tutorial/step12): fix callout formatting