[RFC][WIP] Redesign of packagist.org

Hey,

as some comments from people after showing the sneak peak:

![sneak peak](https://f.cloud.github.com/assets/67402/717118/9d8f0732-df44-11e2-95fb-c230d5fee329.png)

I'm showing my work here, to have comments, disscussion, bashing or whatever :panda_face: 

Right now at this PR last version of header is used:

![headers](https://f.cloud.github.com/assets/67402/717117/981bbb74-df44-11e2-8c71-acaa4e6c1b73.png)

Here is really simple TODO list for pages/macros not redesigned:
- [x] homepage
- [x] edit profile
- [x] change password
- [x] my profile
- [ ] list of packages
- [ ] search page (results - bases on above)
- [ ] my packages (bases on above)
- [ ] my favourite packages (bases on above)
- [ ] package page (bases on above)
- [ ] vendor page (bases on above)
- [ ] popular packages (bases on above)
- [ ] explore (bases on above)
- [ ] browse (bases on above)
- [ ] show profile
- [ ] login
- [ ] register
- [ ] remind password
- [ ] error page
- [ ] statistics
- [x] submit package
- [x] about
- [x] feed

Additionally javascript was not ported to new version.

_I could miss something in that list or duplicate, sorry for that =)_