At the end of a job or a job group, you can execute triggers based on the
outcome of the job. The basic format is (in JSON):

```
{
    "action": "trigger type",
    "condition": "when to execute this trigger",
    [...action-specific configuration...]
}
```

Or in YAML:

```
triggers:
  - action: trigger type
    condition: when to execute this trigger
    ...action-specific configuration...
```

Condition may be one of the following:

- **always**: execute the trigger after every build
- **failure**: execute the trigger after a failed build
- **success**: execute the trigger after a successful build

The following actions are available:

## email

Sends an email summarizing the build results.

*Configuration*

- **to**: The value of the "To" header in the outgoing email, e.g. your email
    address or e.g. `Jim Jimson <jim@example.org>, Bob Bobson <bob@example.org>`

## webhook

Submits the job status (as it would be returned by GET /api/jobs/:id) as a POST
request to a specified URL.

*Configuration*

- **url**: The URL to submit the HTTP request to