Improve Design

1. Lots of unwanted code removed
2. More improvements can be found in submission forms
3. adding images to identify submission types
4. Adding top-tags, top-contributors on right-side-bar
5. Minor content changes like moving "copyrights" code from footer to bottom of right-side-bar
6. Correcting bad code and bad design -- markup.html, profile.html, item.html are few examples where worked on