Merge remote-tracking branch 'origin/master'

Merge pull request #208 from smancke/feature/update-roadmap

updated README for 0.3 release

Merge pull request #183 from smancke/feature/apns-using-context

APNS appTopic + url-pattern + custom message field; doc, vet, readme, roadmap

Merge branch 'master' of github.com:smancke/guble