First commit in the new branch. Start working on a
prototype of a merging animation.
Added structure for MergingNodesAnimation class
Modified the way the merging state will be treated in
AreaAnnotation.
Completed the structure for MergingNodes class and
added TODOs
Fix code in AreaAnnotation.
Delete the d pointer in Properties dialog
Merging nodes animation is almost done. Next: Polishing.
Solved the redundancies from AreaAnnotation::applyChanges().
No more region changes within this method.
Solved small bug
Removed applyChanges() method and other few adjustments
Fix small bug when destroying the whole object after merging
two nodes from a triangle
Fix merging node animation.
Merge branch 'merge_animation'

Conflicts:
	src/plugins/render/annotate/AreaAnnotation.cpp

Added merging node animation