Revert "Added async beforeStart lifecycle method"

This reverts commit f93e789e130e069553d834fd64d34a78c1ca1996.
Revert "Added async afterStart lifecycle method"

This reverts commit 5e22ca400d343c19be3bc0f835fb1dd84fb0a265.
Fixed local anchor problem in tutorial
Merge branch 'v0.12' of github.com:geddy/geddy into v0.12