Update translations
Update releasable language list

Everyting above 98% translated, or only double digit untranslated.
Add release notes for 2.5.0-rc1
Update RELEASE notes and tools

Release notes revised until the tagging part
More release checklist changes
Exclude index polution near localisation files
Lets rather include the docs by default

Packagers can rebuild and users can find built docs if required.
Also ignore setup.py produced build/ dir
Don't package the .git* part of the doc/ theme