ScribbleArea: format code
minor
ScribbleArea: remove unused code.
add pencildef.h
minor
BaseTool: addd 3 methods, mousePressEvent() mouseMoveEvent() mouseReleaseEvent()
ScribbleArea: pass mousePressEvent to currentTool
ScirbbleArea: a small test about undo text
README: update links
README: minor
Merge pull request #1 from chchwy/master

README
MainWindow2: remove unused function populateMenus()
README: change issue tracker's url
Merge pull request #24 from chchwy/master

Issue tracker moved to Github
README: add link to forum
zzz
Merge
remove unused file: mainwindow.h/.cpp
trying to fix linux compile error, not verify yet.
MainWindow2: a stupid error.