LuceO: fixed (again) isoftype
LImage: added constants for ImageType + moved LConstants after all includes in luce.h
LuceO: safeguards for index
LuceO: rectanglelist: addWithoutMerging
LViewport: fixed ScrollBars not correctly returned as a Luce class
LRectangleList: fixed: typo with x
LRectangleList: fixed: no rectangle is added when list is empty
LRectangleList: fixed: add: wrong variable names
LRectangleList: draft
LSlider: fixed optional notification in :setValue
LuceO: starting implementation of a stacktrace
LColour: rearranged constructor
luce/LRectangle: fixed intersects, reduceIfPartlyContainedIn and dump
added: LDrawablePath, LDrawableRectangle, LDrawableComposite (+ LDrawable and LDrawableShape)
LuceO: added luce_tocolour + moved up macros
LColour: simplified constructor by using luce_tocolour (disabled lnew)
LGraphics: refactored all calls to LColour to use luce_tocolour