Use ICON_SIZE_SMALL_TOOLBAR as default icon size

Signed-off-by: Niklas Koep <niklas.koep@gmail.com>
Refactor BlaLibrary's `__detect_changes' method

Signed-off-by: Niklas Koep <niklas.koep@gmail.com>
Remove the biography viewer

Signed-off-by: Niklas Koep <niklas.koep@gmail.com>
Minor format changes of the README and TODO-list

Signed-off-by: Niklas Koep <niklas.koep@gmail.com>