PhaseTransition 1.2

• Add web support: now you can run the simulator directly from your browser! Currently multithreading has been disabled, which makes it quite slow.
• Build system: support tests with cmake and completely remove bazel
• Swap OpenCV for SDL 2.0 to simplify build
• Fix race condition in physics engine introduced in 1.1

PhaseTransition 1.1

• Add Readme
• Downgrade C++ requirement (C++17->C++14)
• Improve physics engine performance