Tagging version 2.9.0

git-svn-id: https://plugins.svn.wordpress.org/mangapress/trunk@1053148 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating language files.

git-svn-id: https://plugins.svn.wordpress.org/mangapress/trunk@1053149 b8457f37-d9ea-0310-8a92-e5e31aec5664