Added match log viewing

[jolewine]

This change adds a basic viewer to the data that is logged into the match log files. It is the start of work for issue #119 and more features are planned, but as this is my first contribution I wanted to make sure I put this forward for review if there are issues with my approach.

Things I have on my roadmap for the feature:

• Elevator buttons to move to next/previous connection/disconnection event in the log
• Tracking the time an indicator is in a bad state (similar to the count up timer in the match play screen)
• Adding match graphs for individual team logs
• Adding match graphs that will show multiple teams to look for field wide issues

[patfair]

@jolewine thanks, this is great! No problems with your approach; I am happy to see whatever FTAs/CSAs would find useful done here.

For this PR please just run go fmt and then the checks should pass and I'll merge it.