Large changes
fix bug
Merge branch 'dev' of github.com:jpush/jpush-api-ruby-client into dev

Conflicts:
	example/push_example.rb
	example/report_example.rb
	lib/jpush/http_client.rb
	lib/jpush/jpush_client.rb
	lib/jpush/model/audience.rb
	lib/jpush/model/message.rb
	lib/jpush/model/messages_result.rb
	lib/jpush/model/notification/android_notification.rb
	lib/jpush/model/notification/ios_notification.rb
	lib/jpush/model/notification/notification.rb
	lib/jpush/model/notification/winphone_notification.rb
	lib/jpush/model/options.rb
	lib/jpush/model/platform.rb
	lib/jpush/model/push_payload.rb
	lib/jpush/model/push_result.rb
	lib/jpush/model/receiveds_result.rb
	lib/jpush/push_client.rb
	lib/jpush/report_client.rb
	lib/jpush/response_wrapper.rb
fix bug
Merge branch 'master' into dev

Conflicts:
	example/push_example.rb
	lib/jpush/http_client.rb
	lib/jpush/model/notification/notification.rb
review ruby api
add limit message