simplified project hierarchy by removing the intermediary 'modules' folder: now every modular piece is directly under src/app
-various visual editor related updates
 * cleaned up visual editor settings access (from getter to dotted)
 * trying to come up with a cleaner way to handler perspective/orthogonal with combined camera
 * cleaned up orbit controls a bit

- added preliminary drag & drop integration
 * just visual aspect and test reading of files works
 * was meant as a mixin (ie elsewhere, but mixin not yet working)
small amount of node-webkit related experiments (namely using the 'web server' aspect of the integrated node instance