Diagrams and project plan update

Visio... yay! Ryan and I have worked together on the Visio side of things to create some diagrams for our tech manual. They look pretty snazzy and hopefully they are actually good at conveying architectural design information too. I updated the project plan document to include a "# hours worked per week" row to keep track of workloads. I plan to work more on the Character Editor today.

Context Diagram showing the data flow between subsystems