Advertise Emscripten support.

README.md

@@ -42,11 +42,14 @@ SUPPORTED PLATFORMS
 *   **OpenGL** 2.1 through 4.4, core profile functionality and modern
     extensions
 *   **OpenGL ES** 2.0, 3.0 and extensions to match desktop OpenGL functionality
+*   **WebGL** 1.0 and extensions to match desktop OpenGL functionality
+
 *   **Linux** and embedded Linux (natively using GLX/EGL and Xlib or through
     GLUT or SDL2 toolkit)
 *   **Windows** (through GLUT or SDL2 toolkit)
 *   **Google Chrome** (through [Native Client](https://developers.google.com/native-client/),
     both `newlib` and `glibc` toolchains are supported)
+*   **HTML5/JavaScript** (through [Emscripten](https://github.com/kripken/emscripten/wiki))
 
 FEATURES
 ========

doc/mainpage.dox

@@ -67,11 +67,14 @@ recent C++11 features and to abstract away platform-specific issues.
 -   **OpenGL** 2.1 through 4.4, core profile functionality and modern
     extensions
 -   **OpenGL ES** 2.0, 3.0 and extensions to match desktop OpenGL functionality
+-   **WebGL** 1.0 and extensions to match desktop OpenGL functionality
+
 -   **Linux** and embedded Linux (natively using GLX/EGL and Xlib or through
     GLUT or SDL2 toolkit)
 -   **Windows** (through GLUT or SDL2 toolkit)
 -   **Google Chrome** (through [Native Client](https://developers.google.com/native-client/),
     both `newlib` and `glibc` toolchains are supported)
+-   **HTML5/JavaScript** (through [Emscripten](https://github.com/kripken/emscripten/wiki))
 
 @section mainpage-features Features