Merge pull request #376 from itblee/master

Translation EN-DE
Adjusted proxy flags in web-browser.
Merge branch 'master' of github.com:symbiose/symbiose
Fixes a bug in gconf.
Symbiose did not redirect to Slym login page when I logout.
Fixes #380.
Adds is_writable() test before checking write access (see #377).
Merge remote-tracking branch 'upstream/master'