kivy:Improve startup speed

gui/kivy/data/glsl/default.fs

@@ -0,0 +1,4 @@
+$HEADER$
+void main (void){
+    gl_FragColor = frag_color * texture2D(texture0, tex_coord0);
+}

gui/kivy/data/glsl/default.vs

@@ -0,0 +1,6 @@
+$HEADER$
+void main (void) {
+  frag_color = color * vec4(1.0, 1.0, 1.0, opacity);
+  tex_coord0 = vTexCoords0;
+  gl_Position = projection_mat * modelview_mat * vec4(vPosition.xy, 0.0, 1.0);
+}

gui/kivy/data/glsl/header.fs

@@ -0,0 +1,10 @@
+#ifdef GL_ES
+    precision highp float;
+#endif
+
+/* Outputs from the vertex shader */
+varying vec4 frag_color;
+varying vec2 tex_coord0;
+
+/* uniform texture samplers */
+uniform sampler2D texture0;

gui/kivy/data/glsl/header.vs

@@ -0,0 +1,17 @@
+#ifdef GL_ES
+    precision highp float;
+#endif
+
+/* Outputs to the fragment shader */
+varying vec4 frag_color;
+varying vec2 tex_coord0;
+
+/* vertex attributes */
+attribute vec2     vPosition;
+attribute vec2     vTexCoords0;
+
+/* uniform variables */
+uniform mat4       modelview_mat;
+uniform mat4       projection_mat;
+uniform vec4       color;
+uniform float      opacity;