Merge branch 'hotfix/0.11.0.1' into release/0.11
Add exim config change to upgrade notes and exim install info.
Backport ruby 1.9 fix for trailing = sign in message headers from mail 2.5
Merge branch 'release/0.11'
We're assuming feed urls without format suffixes should serve up atom/xml, so ignore any format from content negotiation in favour of that default.
Merge branch 'hotfix/0.11.0.4' into wdtk