first step of generic version : array to manage values in TulipPosy.js and View.js
Generic version in progress
object view manages its own properties and became real object
Views are now linked together (for event spreading)
rest of generic modification
Merging between Engine and Interface branches
some cleaning
Merge branch 'engine' into PDP

Conflicts:
	d3/Client.js
	d3/Interface.js
	d3/UpdateViews.js
	d3/View.js
	d3/Visualization.js
	d3/context.js
	d3/graph.js
	d3/graphDrawing.js
	d3/style.css