@add grid support(70%)
Merge branch 'v1.0' into v1.1

Conflicts:
	Makefile
	Makefile.Debug
	Makefile.Release
	src/ui/DsMainFrame.cc
	ui_about.h
	ui_animation_info.h
	ui_frame.h
	ui_pisition.h
	ui_scale.h

@merge v1.0
@begin to add undo/redo support