Different alerts per state

Hi,

I would like to have different behavior per state.

**Example**
Let's say that I have a tick script for CPU usage.
I want to send a HipChat notification for every WARN level reports, and I want to send both HipChat notification and an Email for CRIT level reports.

Can I do this from the same tick script?

Also, I would like to log every entry to a file/influxDBOut, and I want to report sate changes only to HipChat and mail. I know that there is the `.stateChangeOnly()` function, but is there a way to activate it for certain destinations only?

Here is a basic tick script that does not act like I would like it to:

```
stream
|from()
.measurement('cpu')
|window()
.period(5m)
.every(1m)
|alert()
.crit(lambda: "load" > 80)
.warn(lambda: "load" > 60)
.hipChat()
.email('test@test.com')
|influxDBOut()
.database('serverStatus')
.retentionPolicy('autogen')
.measurement('cpuStatus')
```

Thanks!

Start with the alert() and stateChangeOnly() behavior described in the issue, then trace how hipChat(), email(), and influxDBOut() are handled in a TICK script. Done means WARN and CRIT levels can use different destinations while logging continues for every entry and state-change-only behavior can be limited to selected destinations.

Written by the indexing model from the issue text.