Move all resize functionality to DenseBase
Submitted by Hauke Heibel
Assigned to Nobody
Some resize functionality is currently located in PlainObjectBase. We should move that to DenseBase.
The idea is to be able to write generic code and allow resizing on expressions. This would be a NOP in cases where the expressions already have the requested size.
We might want to discuss at some point whether it is the right approach to template over DenseBase<Derived> when an algorithm requires resizing.