Deactivation mode

# Changelog  VERSION = '0.3.4'

* feature
  * Add quick deactivation mode

# Quick deactivation mode

If you want turn off quickly this feature, you can make this
```
  heroku config:add RESQUE_AUTO_SCALE=deactivate -a your_app_name
```

for turn on just remove this config

```
  heroku config:remove RESQUE_AUTO_SCALE -a your_app_name
```