Sponsors component

Built sponsor dashboard, where admin/organizer can add supporter level, organization, and after the donation is received then the can register the sponsorship with details such as person-in-charge, amount, method of donation.

Also built the sponsor component for splash page where the sponsor logos with their website link, description(on hover) will be displayed according to the sponsorship levels.

Here are a few snaps -> 

![screenshot from 2014-05-26 13 12 24](https://cloud.githubusercontent.com/assets/3149236/3081014/4fe936a8-e4b9-11e3-9ec4-e00e0c9ef685.png)
![screenshot from 2014-05-26 15 05 41](https://cloud.githubusercontent.com/assets/3149236/3081016/4fec3f06-e4b9-11e3-870b-26168197cf2d.png)
![screenshot from 2014-05-26 15 06 02](https://cloud.githubusercontent.com/assets/3149236/3081015/4feab3d4-e4b9-11e3-9547-c414836eb1f0.png)