Add global defaults for metatag to os.module #5058

#5058 

#### Changes

* Added basic configurations to os.module as feature exports.
* See export screenshots below.

![screen shot 2014-02-05 at 11 42 33 am](https://f.cloud.github.com/assets/228733/2089249/aede9990-8e84-11e3-9a78-9584b1ccca75.png)
![screen shot 2014-02-05 at 11 42 14 am](https://f.cloud.github.com/assets/228733/2089250/aee609be-8e84-11e3-89a2-a4e27c0d68c7.png)
![screen shot 2014-02-05 at 11 42 02 am](https://f.cloud.github.com/assets/228733/2089251/aee6e226-8e84-11e3-9810-517e4f15add2.png)
![screen shot 2014-02-05 at 11 41 18 am](https://f.cloud.github.com/assets/228733/2089252/aee95308-8e84-11e3-9290-db76db9a509c.png)