Merge pull request #43 from stanislaw/master

Add new podspec (because of recent cocoapods migration to podspec.json)
Merge pull request #45 from stanislaw/master

Fix issue with configureAnnotationForDisplay (#19)
Merge pull request #49 from itsbonczek/dev

Pre-0.2 work
Merge branch 'master' of https://github.com/itsbonczek/kingpin into dev