Anton Kaliaev 4896364952 [cli] cleanup gen_validator output (Fixes #396) ...

so we can pipe result to a file:

```
tendermint gen_validator > example.json
```

before this we had to cut first 3 lines:

```
tendermint gen_validator | sed 1,3d > example.json
```

2017-02-08 23:24:19 +04:00

..

tendermint

[cli] cleanup gen_validator output (Fixes #396)

2017-02-08 23:24:19 +04:00