Added instructions about MultiCurl usage.
Added instructions about MultiCurl usage.

EDSI-Tech/RMSPushNotificationsBundle,Clevis/PushNotifications,peternijssen/RMSPushNotificationsBundle,funkjedi/PushNotificationPackage,nucleartux/RMSPushNotificationsBundle,tomaszhanc/RMSPushNotificationsBundle,davedevelopment/RMSPushNotificationsBundle,kuldeep199221/RMSPushNotificationsBundle,raulfraile/RMSPushNotificationsBundle,richsage/RMSPushNotificationsBundle