CZ translation update (client.cs.yml, server.en.yml) + update of pseudolocalization
More Markdown refactoring - fixed bug with Pagedown not showing on user profile - replaced jQuery occurrences with $.
Merge pull request #371 from kubabrecka/cz_update1

CZ translation update (client.cs.yml, server.en.yml) + update of pseudolocalization
Give a pretty "from" address to the digest emails
Don't include closed or archived topics in the "new topics" section of the daily digest