add package_url option
add package_url option
Update README.md
Merge branch 'master' of https://github.com/whomwah/motion-sparkle into whomwah-master

* 'master' of https://github.com/whomwah/motion-sparkle:
  Update README.md
  add package_url option
  add package_url option
add more url configuration options, building on #6