add and include paperjs v0.9.17
clone without adding to DOM

otherwise paper will rename the thing in question.
clipping workaround not needed anymore
Merge remote-tracking branch 'joscha/master' into update_paperjs
Merge remote-tracking branch 'joscha/master' into update_paperjs
fix the ghosts.

thanks to @lehni (https://github.com/paperjs/paper.js/issues/447)
update to latest paperjs
remove old paperjs
Merge pull request #11 from joschabach/update_paperjs

Update paperjs, merging feature branch.