[CONTROVERSIAL] Update scope: new chart types are off topic
Add strict language to README.
Update to have new chart types in external repos
Update readme about where to put new chart types
Merge pull request #5 from fulldecent/origin/patch-2

Origin/patch 2
Merge pull request #650 from fulldecent/patch-2

[CONTROVERSIAL] Update scope: new chart types are off topic
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Update CONTRIBUTING.md