Add tests for the positioning of the vertical rays and make them pass
Allow users to override global settings, use this in the playground to make things the right scale
Remove some old code, only consider collisions that are close enough
Continue complete test-driven overhaul
Replace is_grounded_ with ground_state_ with tests
Remove old untested logic
Implement acceleration, deceleration, friction and gravity
Fix a problem that would prevent the in_the_air flag being set when there were no collisions
Fix a failing test
Start working on jumping physics
Add an air drag test, switch all velocity updates to be dependent on deltatime
Implement air drag
Implement jumping
Only detect A/B collisions if we aren't moving upwards
Allow installation of the library
Fix some makefile issues
Test updates
Remove tests/main.cpp from the repository and add to .gitignore
Start implementing animation states, stub out some tests
Merge branch 'overhaul' of github.com:Kazade/Spindash into overhaul

Conflicts:
	tests/main.cpp