Add smoth animation for new messages (Fade in effect for messages and scrolldown effect MessageDisplayWidget).
Merge branch 'origin/master'

Conflicts:
	projectfiles/QtCreator/TOX-Qt-GUI.pro
	src/messagedisplaywidget.cpp
	src/messagedisplaywidget.hpp
fix merge error
Add animation settings option
and fix bug
Merge branch 'upstream/master'

Conflicts:
	src/messagedisplaywidget.cpp
	src/messagedisplaywidget.hpp
Merge pull request #45 from Schlumpf/animation

Smoth animation for new messages