OimoPhysics

bugfix: error on shape removing (#51) bugfix: the version in package.json was not correct

• added package.json type as module (#49) so that the library is recognized as an ES6 module
• removed a part of old source code from /old dir

• done adopting to Haxe 4.0
• GenericJoint is officially supported
• bugfixes (#32, #39, #40)
• added JavaScript module version
• minor fixes

• fixed Mat4.ortho
• modified macros
• moved demo sources from /src to /demos/src
• fixed collision filtering bug
• added RigidBody.isSleeping

• interface bug fixed
• removed unused exports