Updated raylib default shader (markdown)

raylib-default-shader.md

@@ -23,6 +23,10 @@ in vec4 vertexColor;        // Vertex input attribute: color
 out vec2 fragTexCoord;      // To-fragment attribute: texture coordinate
 out vec4 fragColor;         // To-fragment attribute: color
 ```
+_All_
+```glsl
+uniform mat4 mvp;           // Model-View-Projection matrix
+```
 
 ## default fragment shader input/output parameters
 
@@ -44,4 +48,10 @@ in vec4 fragColor;          // Fragment input attribute: color
 out vec4 finalColor;        // Fragment output: color
 ```
 
+_All_
+```glsl
+uniform sampler2D texture0; // Fragment input texture (always required, could be a white pixel)
+uniform vec4 colDiffuse;    // Fragment input color diffuse (multiplied by texture color)
+```
+
 NOTE: On _OPENGL_ES2 and OPENGL_21_ we use the default built-in fragment output `gl_FragColor` (same as the explicitly defined `finalColor`).