docker/docker — pull request #8210 by dastergon (2014-09-24 17:08:16+00:00)
Title: improve docs for Gentoo Linux installation

Changes summary:
* Added available USE flags table with default and recommended USE flags(description included).
* Added some tips regarding the use of docker in the Gentoo environment.
* Sorted out docker installation ways.
* Added information about the newly created Gentoo Docker team.
* Misc improvements

Signed-off-by: Pavlos Ratis