Refactor Game Loop and Module system

[adamhleslie]

• [ ] Implement high accuracy timers
• [ ] Redo game loop
• [ ] Rethink how modules are stored/updated

[adamhleslie]

In progress

Game Loop:

• Game Engine Architecture, Jason Gregory: Chapter 7
• http://en.cppreference.com/w/cpp/header/chrono
• https://www.reddit.com/r/gamedev/comments/41v2td/a_modern_c_game_loop_template_mit/cz5k9oy/
• http://www.fabiensanglard.net/timer_and_framerate/index.php
• http://gameprogrammingpatterns.com/game-loop.html
• http://gafferongames.com/game-physics/fix-your-timestep/
• https://www.reddit.com/r/roguelikedev/comments/2uxv79/faq_friday_3_the_game_loop/
• https://www.reddit.com/r/roguelikedev/comments/4pk2k6/faq_friday_41_time_systems/

Module Specific

• Game Engine Architecture, Jason Gregory: Chapter 14.6-14.7
• http://gameprogrammingpatterns.com/event-queue.html