Drop support for go 1.2, test against kafka 0.8.2.1
Drop support for go 1.2, test against kafka 0.8.2.1

ORBAT/kafka,datajet-io/kafka,clessor/kafka,bhirbec/kafka,kmiku7/kafka,gcnonato/kafka,topfreegames/kafka,saleswise/kafka,ChannelMeter/kafka,yejingx/kafka,wvanbergen/kafka,winlinvip/kafka-1,skyportsystems/kafka-2,xlvector/kafka