Fix #3 Wrong MD syntax (bold/italic)

Simply swapped the regexes for ```boldAttributes``` and ```italicAttributes``` in the ```attributeDictionary```. Enough for fixing the MD syntax as described in #3.
![screen shot 2013-12-26 at 21 49 00](https://f.cloud.github.com/assets/3195012/1811932/cd1911d0-6e66-11e3-8d7d-b0806c1e2546.png)