Clean Gruntfile.
Extract the svg element and the D3 graph data to properties.
Extract svg dimensions to properties and force layout to computed property.
Extract path and circle node lists to computed properties.
Convert mouse selection state variables into properties.
Split restart function into node and link restart.
Split restart function into atomic update operations and make them observers.
Fix source mapping generation in neuter.
Merge remote-tracking branch 'origin/graph-view-refactor'