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
Added entanglement computations
Added python plugins management
Tracing file loading
Auto server URL laoding (for easy deployment)
Bug fix in Interface.js
port changed
Merge with PDP branch