Revert "Better filtering for entries that could require code highlighting"

This reverts commit 0fa681b6e700ac7737cccb4372a229287e51b14d.
Updated SimpleServer manual
System fonts instead of PT Mono
Merge pull request #144 from pepelsbey/master

Local server instructions, web font removed
New picture tag
Merge branch 'master' of github.com:operasoftware/devopera