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
Add Undo/Redo to InputTextWidget
Disable Actions if they can't used (i.e. nothing to copy)
Don't allow to copy an empty sting
Add placeholder to InputTextWidget
Add missing Undo/Redo icons.
Add FIXME commtents to replace the placeholder implemetation of InputTextWidget by Qt 5.2s own placeholder.
Reformat some code (brackets).
Merge pull request #48 from Schlumpf/input-text-widget-undo

Add Undo/Redo to InputTextWidget