When sections are created lab assistants should be able to be assigned via the same CSV upload interface. Potential interface: <img width="908" alt="screen shot 2018-01-11 at 19 15 18" src="https://user-images.githubusercontent.com/2927722/34858209-cb69c1b6-f703-11e7-90eb-c5a91d1d5089.png">
When sections are created lab assistants should be able to be assigned via the same CSV upload interface.
Potential interface: