"Uptime" goodie

**What does your Instant Answer do?**

Given an uptime percentage, display various average downtime durations

**What problem does your Instant Answer solve (Why is it better than organic links)?**

Instant meaningful computation for SLA's

**What is the data source for your Instant Answer? (Provide a link if possible)**

n/a

**Why did you choose this data source?**

n/a

**Are there any other alternative (better) data sources?**

n/a

**What are some example queries that trigger this Instant Answer?**

`uptime 99,99%`, `uptime of 99.9998%`

**Which communities will this Instant Answer be especially useful for? (gamers, book lovers, etc)**

IT

**Is this Instant Answer connected to a DuckDuckHack [Instant Answer idea](https://duck.co/ideas)?**

[Idea 984](https://duck.co/ideas/idea/984/uptime-calculator)

**Which existing Instant Answers will this one supercede/overlap with?**

n/a

**Are you having any problems? Do you need our help with anything?**

No

**Where did you hear about DuckDuckHack? (For first time contributors)**

n/a

**What does the Instant Answer look like? (Provide a screenshot for new or updated Instant Answers)**

![screen shot 2014-11-07 at 23 36 54](https://cloud.githubusercontent.com/assets/1193689/4963460/2022038a-6715-11e4-9fe8-c31d6c6dd1ab.png)

## Checklist

```
[x] Added metadata and attribution information (https://duck.co/duckduckhack/metadata)
[x] Wrote test file and added to t/ directory (https://duck.co/duckduckhack/goodie_tests)
[x] Verified that instant answer adheres to design guidelines (https://duck.co/duckduckhack/design_styleguide)
[x] Verified that instant answer adheres to code styleguide (https://duck.co/duckduckhack/code_styleguide)
[x] Tested cross-browser compatibility

    Please let us know which browsers/devices you've tested on:
    - Windows 8
        [] Google Chrome
        [] Firefox
        [] Opera
        [x] IE 10

    - Windows 7
        [] Google Chrome
        [] Firefox
        [] Opera
        [] IE 8
        [] IE 9
        [] IE 10

    - Windows XP
        [] IE 7
        [] IE 8

    - Mac OSX
        [x] Google Chrome
        [x] Firefox
        [x] Opera
        [x] Safari

    - iOS (iPhone)
        [] Safari Mobile
        [] Google Chrome
        [] Opera

    - iOS (iPad)
        [] Safari Mobile
        [] Google Chrome
        [] Opera

    - Android
        [] Firefox
        [] Native Browser
        [] Google Chrome
        [] Opera
```
@mintsoft I believe the only documentation on the available roles is the stuff in the "Advanced" section.  We should probably have a section somewhere which mentions the sort of queries with which the roles can and links to that documentation.