[Bf-docboard] Manual home

[Tobias Heinke]

Hello,

|> I've prepared some images for "home section description"
https://developer.blender.org/D1899 (the images are not included in 
patch yet)

demo: http://blender-manual.readthedocs.io/en/testing/contents.html

reference is http://docs.unity3d.com/Manual/UnityManual.html

|> Home header adds a link icon pointing to blender. org and
it move the language selection in the header shortened  to the 2 char 
ISO-code.
https://developer.blender.org/D1887

|> the demo also shows the latest version of custom toctree
https://developer.blender.org/D1882

This my final version - I can't improve it anymore.

Tobias