Permission alert frop OpenGrep is wrong, as the directory must use 0755.
To make things working and to ease futur changes, I set the default
permission in a constant.
- changed variables that was uppercased, that's not OK for linters
- cleanup some documentation
- remove the "/" in label prefix, a function is now used to get the
complete label (`labelName()`)
- some cleanup in tpl files, and so on...
