3.11.0

Add device Link/unlink events #221

Support following api.

• Device link event
• Device unlink event

Enhanced Messaging API features after redesign(04/18) #225

Get the target limit for additional messages

• add support for "Get the target limit for additional messages api"

Get number of messages sent this month

• add support for "Get number of messages sent this month api"

Send push message

• add support for notificationDisabled param

Send multicast message

• add support for notificationDisabled param

Send broadcast message

• add support for "Send broadcast message api"

Get number of sent broadcast messages

• add support for "Get number of sent broadcast messages api"