Update 'README.md'

README.md

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 # pyceo
 [![Build Status](https://ci.csclub.uwaterloo.ca/api/badges/public/pyceo/status.svg)](https://ci.csclub.uwaterloo.ca/public/pyceo)
 
+[![Main TUI view](https://wiki.csclub.uwaterloo.ca/images/b/bb/Pyceo.png)]
+
 CEO (**C**SC **E**lectronic **O**ffice) is the tool used by CSC to manage
 club accounts and memberships. See [docs/architecture.md](docs/architecture.md) for an
 overview of its architecture.