Visualize and edit machine translation derivations using raphaeljs.
Took raphael.inline_text_editing.js from [1].
Partially adapted from [3] and [2].

Resources:
 [1] https://github.com/marmelab/Raphael.InlineTextEditing
 [2] http://grokbase.com/p/gg/raphaeljs/135twn41fq/how-to-move-text-and-rect-together-using-raphaeljs
 [3] http://raphaeljs.com/graffle.html