Vividcortex script

This script adds support for VividCortex tools.

 Examples:
`hubot share top-queries last month`
`hubot share top-processes last 10 minutes`
`hubot share query-compare last 20 days`

Thanks to coffeescript, `switch` returns a value, so you can:

```coffeescript
from = switch unit
       when "seconds", "second" then 1
       when "minutes", "minute" then 60
       when "hours", "hour" then from 3600
       when "days", "day" then 3600 * 24
       when "months", "month" then 3600 * 24 * 30
       else from = 3600
```