Feature private limit beta

Config:

![config](https://f.cloud.github.com/assets/1962678/729674/589521b8-e23a-11e2-8096-83073c0f2caf.png)

Admin:

![admin](https://f.cloud.github.com/assets/1962678/729673/58529528-e23a-11e2-8a4f-a8e8a2928d9e.png)

Quota:

![quotas](https://f.cloud.github.com/assets/1962678/729676/589e61ec-e23a-11e2-8cb5-13639892cfb2.png)

Limit:

![limit](https://f.cloud.github.com/assets/1962678/729675/589afea8-e23a-11e2-9e5f-b6b1230451d3.png)

**Feel free to leave any feed back on this feature.**