added RGBA hex color parsing for GLSL, fixed alpha blending bug

shaders/bars.glsl

@@ -7,13 +7,13 @@
 /* width (in pixels) of each bar gap */
 #define BAR_GAP 2
 /* outline color */
-#define BAR_OUTLINE vec4(0.15, 0.15, 0.15, 1)
+#define BAR_OUTLINE #262626
 /* outline width (in pixels, set to 0 to disable outline drawing) */
 #define BAR_OUTLINE_WIDTH 0
 /* Amplify magnitude of the results each bar displays */
 #define AMPLIFY 300
 /* Bar color */
-#define COLOR (vec4(0.2, 0.4, 0.7, 1) * ((d / 60) + 1))
+#define COLOR (#3366b2 * ((d / 60) + 1))
 /* Direction that the bars are facing, 0 for inward, 1 for outward */
 #define DIRECTION 0
 /* Whether to switch left/right audio buffers */