pockeview: common code for all tree elements.
allow '1000.' number format in g-code simulateur.
index page simulation is now done in a worker.
index page simulation now does basic error reporting
 - also when worker lanches an exception, re-tries the simulation outside the worker.
fix bug where worker gets collected on index page simulation
 - also use types array between the worker and the page to try to improve performance.
fix oldCAM.html
use a SVG spinner for g-code simulators.
pocketview: don't destroy computing view with "seen from far" view
started a preliminary interactive text tool.
 - debounced text recomputation
improved (hopefuly) front page simulator
 - remove useless graphs.
 - display run time and bounding box.
better bound table layout on the front page
front page simulator: overlay line under the cursor in the 3D view.
front page simulator: fix mouseout removes overlay
front page simulator: use bufferGeometry for 3D display, bump three.js version
 simpler ACE ember component
improve 3D view display
 - thicker lines
 - real methods for tool positionning and display
 - canvas renderer fallback
better webgl detection
front page simulator: highligth only the line under cursor
3D view: allow 2 fingers pan
3D view: viewpoint on the simulation
3D view now uses orbit control, bump three.js version