Submitting Name Days Goodie

**What does your Instant Answer do?**
Displays name days for a given name or date. See https://en.wikipedia.org/wiki/Name_day

**What problem does your Instant Answer solve (Why is it better than organic links)?**
The answer is shown instantly, without the need to peruse a website.

**What is the data source for your Instant Answer? (Provide a link if possible)**
https://en.wikipedia.org/wiki/Name_days_in_Poland

**Why did you choose this data source?**
It's available under an open-source license.

**Are there any other alternative (better) data sources?**
The original Instant Answer Idea mentions http://www.namedaycalendar.com/

**What are some example queries that trigger this Instant Answer?**
name day Maria
name days today
1 June name day

**Which communities will this Instant Answer be especially useful for? (gamers, book lovers, etc)**
Polish users.

**Is this Instant Answer connected to a DuckDuckHack [Instant Answer idea](https://duck.co/ideas)?**
https://duck.co/ideas/idea/4590/name-days

**Which existing Instant Answers will this one supercede/overlap with?**
None.

**Are you having any problems? Do you need our help with anything?**
None.

**Where did you hear about DuckDuckHack? (For first time contributors)**
From the DuckDuckGo main page.

**What does the Instant Answer look like? (Provide a screenshot for new or updated Instant Answers)**
![nameday](https://cloud.githubusercontent.com/assets/9570467/5007061/564e4f04-6a44-11e4-8c79-4ca2d31eacbe.png)

## Checklist
Please place an 'X' where appropriate.

```
[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:
    - Windows 8
        [] Google Chrome
        [X] Firefox
        [] Opera
        [] IE 10

    - Windows 7
        [] Google Chrome
        [] Firefox
        [] Opera
        [] IE 8
        [] IE 9
        [] IE 10

    - Windows XP
        [] IE 7
        [] IE 8

    - Mac OSX
        [] Google Chrome
        [] Firefox
        [] Opera
        [] Safari

    - iOS (iPhone)
        [] Safari Mobile
        [] Google Chrome
        [] Opera

    - iOS (iPad)
        [] Safari Mobile
        [] Google Chrome
        [] Opera

    - Android
        [] Firefox
        [] Native Browser
        [] Google Chrome
        [] Opera
```

@W25 if you could generalize it for other countries that would be excellent!