New Spice: Today in History

I noticed that this IA was existing but not working. The spice url was using an old link that was returning an XML output. 
I preferred to rewrite it from scratch.

**What does your Instant Answer do?**

Gets a random event from Wikipedia that is happened in the current day

**What are some example queries that trigger this Instant Answer?**

today in history , this day in history 

**Which communities will this Instant Answer be especially useful for? (gamers, book lovers, etc)**

historians , curious people

**What does the Instant Answer look like? (Provide a screenshot for new or updated Instant Answers)**
![schermata 2014-12-01 alle 11 58 31](https://cloud.githubusercontent.com/assets/8344987/5244638/9fcef978-7951-11e4-859a-da7e116cefcf.jpg)


## 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)
[X] Tested cross-browser compatibility

    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
        [X] Safari

    - iOS (iPhone)
        [] Safari Mobile
        [] Google Chrome
        [] Opera

    - iOS (iPad)
        [] Safari Mobile
        [] Google Chrome
        [] Opera

    - Android
        [] Firefox
        [] Native Browser
        [] Google Chrome
        [] Opera
```