feat($state): expose previous state/params via $state
Update README.md added the LearnCode.academy vid

The free LearnCode.academy video on youtube from Will Stern covers some of the ui-router quite nicely.
Merge pull request #1238 from alexanderchan/patch-1

Update README.md added the LearnCode.academy vid
fixes #1079

state will now be reloaded if `state.reloadOnSearch = false` when doing `state.go('stateName', {reload: true})`
Merge branch 'previous-state'