Update catalan translation.
Escape apostrophe.
adapt broken pop3 server
adapt to a corner case for broken server.
Update strings.xml

instead of #326
Update strings.xml
Update strings.xml

improved
Merge pull request #320 from kiike/i18n-ca

Update catalan translation.
Merge pull request #323 from jca02266/adapt_broken_server

Adapt broken pop3 server
Chinese translation update
Merge pull request #327 from bboa/master

Russian update - ready#2
changelog update
Bumped manifest to 4.505
Don't save signature to identity header if identity doesn't use a signature