IndianRailPNRStatus Goodie Instant Answer

**What does your Instant Answer do?**
It provides the PNR status for Indian Railways

**What problem does your Instant Answer solve (Why is it better than organic links)?**
There aren't any sites currently which provide instant result. Getting PNR status by just searching on a search engine would really be helpful

**What is the data source for your Instant Answer? (Provide a link if possible)**
The official API provided by Indian Railways. 
http://api.erail.in/

**Why did you choose this data source?**
Because it is official and it is the central source for all PNR enquiry sites. 

**Are there any other alternative (better) data sources?**
No. There are a few but there are some issues with them. Some of them are paid and some of them provide limited usage 

**What are some example queries that trigger this Instant Answer?**
pnr 4101917424

**Which communities will this Instant Answer be especially useful for? (gamers, book lovers, etc)**
Travellers, Passengers, Indian citizens, Tourists, General Public

**Is this Instant Answer connected to a DuckDuckHack [Instant Answer idea](https://duck.co/ideas)?**
Yes. 
https://duck.co/ideas/idea/4594/pnr-status-for-indian-railways

**Which existing Instant Answers will this one supercede/overlap with?**
None.

**Are you having any problems? Do you need our help with anything?**
No, I guess. May be with the tests?
And I have a query about something too.


**What does the Instant Answer look like? (Provide a screenshot for new or updated Instant Answers)**
![ddg_pnrstatus](https://cloud.githubusercontent.com/assets/6749387/5277720/c3c91da8-7af6-11e4-8fad-3f78eaa52d3d.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)
[] Tested cross-browser compatibility

    Please let us know which browsers/devices you've tested on:
    -  Linux
        [X] Firefox