Added matplotlib to snippets directory.
Added matplotlib to snippets directory.

fvpolpeta/devide,ivoflipse/devide,zhangfangyan/devide,nagyistoce/devide,chrisidefix/devide,ivoflipse/devide,chrisidefix/devide,nagyistoce/devide,fvpolpeta/devide,zhangfangyan/devide