Minor refactorings to reflect my latest best practices.

Signed-off-by: Florian Wolters <wolters.fl@gmail.com>
Added `nbproject` directory to `.gitignore`.

Signed-off-by: Florian Wolters <wolters.fl@gmail.com>
Changed "code"-comments, so they are compatible with "standard" Markdown.

Signed-off-by: Florian Wolters <wolters.fl@gmail.com>