Add ozunconf topic to repo

[adam-gruer]

As per:
Would be great if people could add topic "ozunconf18" to their ropenscilabs repo so people can find your work grouped that way

How to add topic: https://help.github.com/articles/classifying-your-repository-with-topics/

e.g. all unconf18 project repos: https://github.com/topics/unconf18

[annaquaglieri16]

Great idea !!