Create newcomer tasks

Some tasks may be really easy to finish, but just need to get done and are a bit on the backburner. By marking these as `newcomer` tasks, you can let people new to your project maybe dip their toe in the water. 

http://shaunagm.github.io/personal/pycon2015.html#/30
http://shaunagm.github.io/personal/pycon2015.html#/37
