Add test to ensure DOM element is bound to node object
Added documentation for lineInterpolate
Merge pull request #123 from ulilicht/master

Added documentation for lineInterpolate
Add edge.elem property
Move edge id attribute to the containing group
Merge branch 'edge-elem' into edge-elem-build

* edge-elem:
  Move edge id attribute to the containing group
  Add edge.elem property
  Added documentation for lineInterpolate
  Add test to ensure DOM element is bound to node object
Update build