Include more information to not translate Ghost yet
Fix link to troubleshooting tips
Merge pull request #1512 from matthojo/gh-pages

Include more information to not translate Ghost yet
Merge pull request #1513 from jgillich/gh-pages-fix

Fix link to troubleshooting tips
Remove translation chapter from translations
Merge pull request #1515 from jgillich/gh-pages-translation
Started German translation
Translate Installation & Mail to German and apply updates
Translate Themes Doc to German