fix links to aframe-physics-system

Author: vincentfretin

CHANGELOG.md

@@ -15,6 +15,6 @@
 ## v4.0.0
 
 * Added CHANGELOG.md
-* Removed `universal-controls`, replacing with `movement-controls`. In contrast to previous releases, `movement-controls` is intended to be used _with_ the default `look-controls` component. It adds several locomotion methods, and can be extended to include more, replacing `wasd-controls`. See [documentation](https://github.com/donmccurdy/aframe-extras/tree/v4.0.0/src/controls).
+* Removed `universal-controls`, replacing with `movement-controls`. In contrast to previous releases, `movement-controls` is intended to be used _with_ the default `look-controls` component. It adds several locomotion methods, and can be extended to include more, replacing `wasd-controls`. See [documentation](https://github.com/c-frame/aframe-extras/tree/v4.0.0/src/controls).
 * Added navmesh support to `movement-controls`.
-* Removed physics. Instead, include it separately via [aframe-physics-system](https://github.com/donmccurdy/aframe-physics-system).
+* Removed physics. Instead, include it separately via [aframe-physics-system](https://github.com/c-frame/aframe-physics-system).

README.md

@@ -91,7 +91,7 @@ The following components existed in previous versions of A-Frame Extras, but hav
 
 | Component        | Removed in | Reasons                                                      |
 | ---------------- | ---------- | ------------------------------------------------------------ |
-| `kinematic-body` | 7.0.0      | Using physics for movement is unstable and performs poorly. When preventing players from passing through obstacles, use a navigation mesh instead whenever possible.<br /><br />The `kinematic-body` component constrainted player movement using physics, and depended on [aframe-physics-system](http://github.com/donmccurdy/aframe-physics-system/). Using physics for locomotion is not VR-friendly, and often glitchy even for traditional 3D experiences. [Use a navigation mesh](https://github.com/donmccurdy/aframe-extras/tree/master/src/controls#usage) instead, whenever possible. |
+| `kinematic-body` | 7.0.0      | Using physics for movement is unstable and performs poorly. When preventing players from passing through obstacles, use a navigation mesh instead whenever possible.<br /><br />The `kinematic-body` component constrainted player movement using physics, and depended on [aframe-physics-system](http://github.com/c-frame/aframe-physics-system). Using physics for locomotion is not VR-friendly, and often glitchy even for traditional 3D experiences. [Use a navigation mesh](https://github.com/c-frame/aframe-extras/tree/master/src/controls#usage) instead, whenever possible. |
 | `jump-ability`   | 7.0.0      | Dependent on `kinematic-body`                                |
 | `a-hexgrid`      | 7.0.0      | Was based on [this repo](https://github.com/vonWolfehaus/von-grid), which is no longer maintained, and does not work with recent versions of THREE.js. |
 | `mesh-smooth`    | 7.0.0      | Intended for JSON models, but the JSON Loader is [no longer part of this repo](https://github.com/c-frame/aframe-extras/commit/d079064e6ac55a4cd6bbf64bd46a576e26dd214e).  More background [here](https://github.com/c-frame/aframe-extras/issues/411). |