libroar/RoarCanvasWindow.py:applyTool(): delegate updating of brushPos to ToolText if current tool.
libroar/RoarCanvasWindow.py:applyTool(): fix function result.
libroar/RoarCanvasWindow.py:applyTool(): pass updated set of arguments to on{Keyboard,Mouse}Event().
libroar/RoarCanvasWindow.py:onKeyboardInput(): allow wrapping around canvas when receiving cursor key input.
libroar/RoarCanvasWindow.py:onKeyboardInput(): supply keyCode or None to applyTool().
libroar/RoarCanvas{CommandsTools,Window}.py: supply keyCode or None to applyTool().
libtools/Tool{,Circle,Fill,Line,Object,Rect}.py:on{Keyboard,Mouse}Event(): update type signature.
libtools/ToolText.py:onKeyboardEvent(): fully implement {arrow keys,backspace,enter}.
libtools/ToolText.py:onKeyboardEvent(): update cursor when necessary.
libtools/ToolText.py:onMouseEvent(): correctly set brushPos if mouseLeftDown or mouseRightDown.
libtools/ToolText.py:__init__(): removed.
assets/text/TODO: updated.