Flatter design on User Page

- Cleanup the design ( remove border-radius , some border , updated some colors , better spacing of elements )
- Fixed some misalignment and width in mobile and small and medium screen size
- Better render on mobile mode

![desktop large](https://f.cloud.github.com/assets/1064904/1454142/d8929074-4303-11e3-8f54-c20ad20b031b.png)
![mobile](https://f.cloud.github.com/assets/1064904/1454152/057815fa-4304-11e3-8991-e684a276388b.png)