- more work on visual editor:
 * turns out, the workflow, while buggy as hell, is quite pleasant to use
 * added more keyboard shortcuts
 * fixed lots of minor issues (not listing, as this proto is still WAY too
much in early phase, everything might change)
 * experimenting with a more "component" oriented approach to drag & drop :
   * added drag-drop element : not really that great, as it would require
re-dispatching all events to layers below it
 * added minor notes
- a bit of cleanup of visual-editor:
 * moved various helpers into lib/helpers
 * various minor cleanups

- started working on connectors
 * just added class with its visual helpers, nothing functional so far
 * added further notes
- updated shape-creator
 * updated styling
 * added stubs for various additional operations