New Spice: Launchbug

# Goodie Pull Request Template

**What does your Instant Answer do?**

Returns infos about a bug posted on Launchpad.net

**What problem does your Instant Answer solve (Why is it better than organic links)?**

It is faster and more usefull

**What are some example queries that trigger this Instant Answer?**

launchbug 7
launchbug 2341

**Which communities will this Instant Answer be especially useful for? (gamers, book lovers, etc)**

coders, bug hunters, Ubuntu lovers

**What does the Instant Answer look like? (Provide a screenshot for new or updated Instant Answers)**
![schermata 2014-12-04 alle 10 40 53](https://cloud.githubusercontent.com/assets/8344987/5296484/ad0f46ec-7ba4-11e4-8268-209b85a82f3f.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)
[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
```

Should check if `api_result` is empty OR check the `error` parameter.

Example:
`if (!api_result || api_result.error) {`