Command to send a test push notification
Tidy code
Check token is the right length for common services
Check for badge method, not for iOS service type

Maybe in future other message types will support badging.
Add blackberry and mac message types

Simplify setting the default sound on apple messages - call the option
whenever it exists.
Merge pull request #59 from whiteoctober/feature/test-command

Command to send a test push notification