Merge pull request #3 from Parareru/master

merge
Merge pull request #4 from Parareru/master

merge
fix bug of deleting obj
	modified:   glwidget.cpp
	modified:   glwidget.h
	modified:   mainwindow.cpp
	modified:   mainwindow.h
	modified:   miniBlender.pro.user
add control of offset and scale by three dimensions
	modified:   OBJ.cpp
	modified:   OBJ.h
	modified:   glwidget.cpp
	modified:   glwidget.h
	modified:   mainwindow.cpp
	modified:   mainwindow.h
	modified:   mainwindow.ui
Merge pull request #2 from Just-CJ/master

Merge request