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
Merge branch '3.1' into 3.1-ja.
Translate related to f07841989a5395fc452871c6219f99c412756a58.
Translate remained in English.
Reflect change in de95e3f79d11d920bfc3dc033165e3be379a96b4.
The same clean up as 3.0-ja branch.
Clean up.
Clean up.
Backquote "safe_mode".
データコンテナオブジェクト => DataContainerオブジェクト.