test with go 1.5, skipping 1.3 and 1.4
test with go 1.5, skipping 1.3 and 1.4

chrislusf/seaweedfs,hxiaodon/seaweedfs,chrislusf/seaweedfs,k85169336/seaweedfs,chrislusf/seaweedfs,hxiaodon/seaweedfs,chrislusf/seaweedfs,k85169336/seaweedfs