School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com|School of Computing Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. andrew.mcpherson@gmail.com