Version 1.15.1

• This is a preparation to some code-refactoring and bigger changes aimed for v2
• Preparation to deprecate getScroll and getAreaRect. They will both become internal methods. Unless you've valid reasons to keep exposing them.
• We will soon also prevent you from using most internal methods (those marked with _ at the start). You'll not be able to extend them, nor override, nor use directly. Also here, unless you've valid reasons to keep them exposed.