implement proprietary adjustment methods

[stolsky]

• In visualization.js as well as in d3_adapter.js use only common and generic attribute names.
• To achieve that, replace attribute names which differ from our attribute name catalogue used in visualization.js and in d3_adapter.js

[stolsky]

add checks while traversing object paths

• existing checks:

  if (hasProperty(obj, prop)) {
  obj = obj[prop];
  }