Update README.md
tests(midway): adds some midway testing
update version
Merge branch 'master' of github.com:PascalPrecht/ng-translate
fix(tests): travis CI
feat(translateService): adds method to configure indicators for not found translations

- adds translateProvider.translationNotFoundIndicatorLeft()
- adds translateProvider.translationNotFoundIndicatorRight()
- adds translateProvider.translationNotFoundIndicator()

the latter makes use of the former two methods. this means you could set
both indicators explicitly if needed.

Closes #77
Merge branch 'canary' of github.com:PascalPrecht/ng-translate into canary