Cleaner UI for membership/subscription component

Upgraded the UI.
![adhesionrevamp](https://cloud.githubusercontent.com/assets/3430891/5232881/ffea4794-772c-11e4-8e2f-5653cec86ca8.PNG)

use `formatDate` instead of `moment` directly. `formatDate` is already a wrapper for moment, simply do `formatDate(your date, your format)`