Start adding protocol to handle selection

Change-Id: I819e9b0dd09a6049ddd5eff6540b8de23e2a864f
Move VTK forward

Change-Id: Id3cc312cc0f469f3b944306fdf1ce6d8d82fca1c
Merge topic 'pvweb-extend-protocol-list' into next

dfdd29e Move VTK forward
b491261 Start adding protocol to handle selection