Changelog and version number
5.1 instead of 5.0.8
Merge pull request #129 from Yoast/5.0.8

Changelog and version number 5.1[#81471192]
Change support options in readme.txt for wordpress.org
Updates translations.
* Added Russian,
* updated Dutch and Finnish and
* renamed Greek to match the WP locale.
Updated .pot file
Updated translations.
Removed all languages with < 50% translated.
WIP
Submodule added included api libs in autoloader
Make 'extensions' the main menu item in network admin
Ga premium image added
Merge branch 'trunk' into stories/pvw/gaimage
Updated image
Merge pull request #134 from Yoast/stories/PVW/gaimage

Added premium extension image
Using API Library instead of OAuth file in GA
Added file in autoloader
Moving admin functionality into it's own class
New classes for dashboards
Merge pull request #133 from Yoast/stories/OR/multisite-bug

Make sure GA menu is also added to network admin [Finishes #82014956]
Merge branch 'trunk' into stories/PVW/api-libs

Conflicts:
	includes/class-autoload.php