removed all examples -> redistributed in benchmarks

examples/500views.geo

examples/Bug_MaillageSplines.geo

examples/animation.geo

examples/big.geo

examples/biz.geo

examples/brain.geo

examples/bug_demi_cercles.geo

examples/bug_ellipses.geo

examples/bug_ruled.geo

examples/bug_select.geo

examples/carre.geo

examples/coin.geo

examples/cube.geo

examples/d2.geo

examples/dd.geo

examples/fissure.geo

examples/function.geo

examples/h6.geo

examples/lists.geo

examples/loop.geo