added package.json
Merge branch 'README-URLS'
removed something
removed a typo
added complex polygon example
updated version number
added concave polygon example
added convex polygon example
added keyboard input example
added mouse control example
Merge branch 'master' into README-URLS
added explainations to links
updated readme
added warning to readme
Merge branch 'master' into README-URLS
added urls for the new files to README.md