Merge pull request #36 from baasbox/master

pull request from repository baasbox, branch pushProfile
Merge pull request #37 from baasbox/master

pull request from repository baasbox
add new exception for handle the follow event: Push sent, but Google Cloud Messaging for Android is disabled
add IOException for GCMServer send
Merge pull request #492 from lupatellimatteo/master

add exception for push notifications