-many minor improvements and bugfixes to visual editor:
* re added a few important icons as overlay to visual editor (these are overlays to the editor so they can be used in viewer mode as well)
among these : projection type (perspective/ortho, grid on/off, axes on/off, autorotate, outline) almost done with #89 (in a slighltly different way as they won't be part of main toolbar)
* modified orbitcontrols and combined camera so that switching between perspective and ortho is now "seamless" (still a few minor things to fix, but it works) : closes #134
* fixes small bug with outline being "blury" after a view resize fixes #137

- some CakeFile fix to accomodate change to lessc compiler : fixes #138

-worked towards #135
* added flag to hide main menu (for viewer mode)