Update lab-05-uirouter.md

Fixed a typo
Fixed the index slide
Merge pull request #135 from objectpartners/feature/index-slide

Fixed the index slide
Fixed a typo in lecture 6
Small style fix
Updated some content on Lecture 7
Merge branch 'develop' into feature/lab-review

* develop:
  Updated some content on Lecture 7
  Small style fix
  Fixed a typo in lecture 6
  Fixed the index slide
  Update lab-05-uirouter.md