Updating readme to include info about what happens when device goes offline
Updating readme to include info about what happens when device goes offline

treasure-data/KeenClient-iOS,heitortsergent/KeenClient-iOS,treasure-data/KeenClient-iOS,Acidburn0zzz/KeenClient-iOS,Acidburn0zzz/KeenClient-iOS,heitortsergent/KeenClient-iOS,getdrop/KeenClient-iOS,keenlabs/KeenClient-iOS,Acidburn0zzz/KeenClient-iOS,treasure-data/KeenClient-iOS,keenlabs/KeenClient-iOS,keenlabs/KeenClient-iOS,Acidburn0zzz/KeenClient-iOS,getdrop/KeenClient-iOS,getdrop/KeenClient-iOS,heitortsergent/KeenClient-iOS,getdrop/KeenClient-iOS,heitortsergent/KeenClient-iOS,treasure-data/KeenClient-iOS,Acidburn0zzz/KeenClient-iOS,getdrop/KeenClient-iOS,heitortsergent/KeenClient-iOS