[DOCS] 7.5 Docs move Github Docs

Pros have been made, so we move the docs in the correct folder.

Change-Id: I0b0b21a6b00bde164491cce7ed1f6527e0ad726f
Reviewed-on: http://review.typo3.org/43455


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>