* Enable CA2000 in editorconfig
* Remove unused CaptureStdOut class
* Add missing dispose calls in Sandbox.Tools
* Add missing dispose calls in tests
* Add missing dispose calls in launchers
* Add missing dispose calls in Topten.RichtTextKit
* Add missing dispose calls in Engine
* Add missing dispose calls in SboxBuild
* Add nullchecks to a few dispose calls
* Fix more missing disposal calls and leaks
* Disable CA2000 for Textures
* Fix disposing too early in ImageFileTextureGenerator
* Fix disposing codec, ownership is transferred to animation
* Add missing using in ByteStream benchmark
- Added Sandbox.Test.Unit project (contains independent tests that can run in parallel)
- Modify some slow/stress tests (e.g. instead of doing a million iterations settle for 10k).
Tests run almost twice as fast now.