New theme: Vinget

Hey Thomas, 
I have created another theme for the swatch. Please feel free to alter the theme and also name if required :)
Here is a sneak peak: 
![bootswatch vinget](https://f.cloud.github.com/assets/971411/804507/c2c82e4a-ee10-11e2-971e-2fb0102b57a0.png)