Foundations to transform documentation repository into directory:

* Create ProjectInfo.cmake in documentation folder, to be picked up by
  Doxygit.cmake
* Rewrite Doxygit.cmake
* Move various settings from CommonCPack into Common to be able to use
  them earlier
* Extend and rename GithubOrganization -> GithubInfo

See image for new page layout. Final icons will be added tomorrow with proper attributions.
![screen shot 2014-03-05 at 15 45 15](https://f.cloud.github.com/assets/354947/2334103/db15ac64-a474-11e3-9abb-9b5ec2647a79.png)