Show series names

Resolves issues #8 and #9

Example output:

```
nameA
┌──────────────────┬─────────────────┬───────┐
│       time       │ sequence_number │ value │
├──────────────────┼─────────────────┼───────┤
│ 20/6/14 19:00:06 │ 9252350001      │ 31616 │
└──────────────────┴─────────────────┴───────┘
Query took  223 ms
nameB
┌──────────────────┬─────────────────┬─────────┐
│       time       │ sequence_number │ value   │
├──────────────────┼─────────────────┼─────────┤
│ 20/6/14 19:00:06 │ 9252050001      │ 1239248 │
└──────────────────┴─────────────────┴─────────┘
Query took  223 ms
```