Big fixes for "master" branch

- vector.js is now almost perfect (is 95% equivalent to three.js)
- little upgrade for point.js
- upgraded all examples (added function remove - really useful, because
it can get crowded on the grid and at the end could also get really
messy)
- calculations for all examples are now done with vector.js....

TODO:
- still have to do Matrix.js, Camera.js ...
- for now will play with mouse over and color changing (it is still hard
to tell witch element is being changed and witch not)....

IT WOULD BE REALLY HELPFUL IF THIS COULD BE MERGED WITH "MASTER" BRANCH