Simplify nodes circle size assignment
Merge branch 'master' into add-operator-selector-on-d3-nodes
moved node labels to the left of the node.
added operator select menu (not yet functional)
Updated jQueryUI
updated to jQueryUi 1.11.1
added operator and ui to json
removed calculate SVI GUI. made calculation use operators from tree
removed parenthesis
added parent operator selector when clicking on children nodes
refactored operators names into dictionary
refactored in JS also
Merge pull request #51 from gem/add-operator-selector-on-d3-nodes

Add operator selector on d3 nodes and use it for calculation