pushing steam sales instant answer

**What does your instant answer do?**
Fetch featured games on sales at Steam Store

**What problem does your instant answer solve (Why is it better than organic links)?**
Get to instantly know best Steam offers

**What is the data source for your instant answer? (Provide a link if possible)**
Official Steam Store (http://store.steampowered.com/)

**Why did you choose this data source?**
Steam has its own official api

**Are there any other alternative (better) data sources?**
No

**What are some example queries that trigger this instant answer?**
steam sale, steam offers

**Which communities will this instant answer be especially useful for? (gamers, book lovers, etc)**
gamers

**Is this instant answer connected to a DuckDuckHack [instant answer idea](https://duck.co/ideas)?**
Yes, https://duck.co/ideas/idea/976/steam-sales

**Which existing instant answers will this one supersede/overlap with?**
Steamdb 

**Are you having any problems? Do you need our help with anything?**

**\*\*Note:** Please attach a screenshot for new instant answer pull requests, and for pull requests which modify the look/design of existing instant answers.

##Checklist
Please place an 'X' where appropriate.

```
[X] Added metadata and attribution information
[X] Wrote test file and added to t/ directory
[X] Verified that instant answer adheres to design guidelines(https://github.com/duckduckgo/duckduckgo-documentation/blob/master/duckduckhack/styleguides/design_styleguide.md)
[X] Tested cross-browser compatability

    Please let us know which browsers/devices you've tested on:
    - Windows 8
        [] Google Chrome   
        [] Firefox         
        [] Opera           
        [] 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         
        [] Opera           
        [] Safari          

    - iOS (iPhone)
        [] Safari Mobile   
        [] Google Chrome   
        [] Opera           

    - iOS (iPad)
        [] Safari Mobile   
        [] Google Chrome   
        [] Opera            

    - Android
        [] Firefox         
        [] Native Browser  
        [] Google Chrome   
        [] Opera
```