Translation source update

String changes: added 5, removed 2 strings.


git-svn-id: http://amule.googlecode.com/svn/trunk@10858 6ea3b165-b8b8-dda6-0cea-db2f03e7d5ff
Fix headers in .po files

The "Language" header is there since 2010, and recent msgfmt already complains,
if it doesn't find it.

git-svn-id: http://amule.googlecode.com/svn/trunk@10859 6ea3b165-b8b8-dda6-0cea-db2f03e7d5ff