* Build tags need to come before the package name
and have at least a blank line, between them and
the package, please see
https://golang.org/pkg/go/build/#hdr-Build_Constraints
* fmt.Println doesn't take formatting verbs
* Fix a missing formatting argument to fmt.Printf
This commit adds the basic test command 'abci-cli test' that will
allow developers of server for their own language to continuously test
their implementation.