Make marker string set reality.

It is not "INSTALL TOOL START" but "INSTALL SCRIPT START".
A very small fix to translate to English.
Merge branch '3.0-translate-to-english' of https://github.com/taca/docs into 3.0
Merge branch '2.11-fix-localconfig' of https://github.com/taca/docs into 2.11
Merge branch '2.11' into 3.0
Merge branch '3.0' into 3.1
Change an example with the "tasks" module which is an extension now
Added german translation
Merge branch '3.0' into 3.1