* Removes static `IoCManager` service locator calls from `Robust.Shared.Map` namespace.
* Misc code cleanup and filling out doc comments for Map classes.
* Added Union and Intersect methods to Box2.
* Any touched component was converted from static IoC calls to field injection.
Sibling PR to https://github.com/space-wizards/RobustToolbox/pull/796.
* Fixed sprite issues with construction system (Thanks PJB!).
* Storage and Hands Systems now subscribe to Transform Parent changes, and will keep their containers in sync.
* Add check in Interaction System to prevent processing client-side entities on the server.
1. Updates all the NuGet packages (except CommandLineParser because they ruined their API)
2. Makes all projects use C# 7.2 explicitly. (not latest)
3. Use some C# 7.2 features like readonly structs and default literals.
Various minor interaction features.
There is no concept of gravity in the game yet, so items drift through space or the hallways of a station until they are stopped. Thrown items do not collide with walls because making them collidable makes them collide with EVERYTHING, including the player. We need collision groups in the physics system.
Because of the previous problems the velocity things are throw at is set quite low, it can be tweaked after the other mentioned issues are resolved.
