adding the shapes_logo_raylib example.

adding the missing press checks in the core_input_mouse example:
I added the missing MOUSE_BUTTON_SIDE,MOUSE_BUTTON_EXTRA,MOUSE_BUTTON_FORWARD,MOUSE_BUTTON_BACK press checks.

note: my mouse doesn't have the "forward" and "back" buttons, so I couldn't test if they work

examples/shapes/shapes_logo_raylib.py

@@ -0,0 +1,43 @@
+"""
+
+raylib [core] example - Logo Raylib
+
+"""
+from pyray import *
+from raylib.colors import (
+    RAYWHITE,
+    BLACK,
+    GRAY
+)
+
+# Initialization
+screenWidth = 800
+screenHeight = 450
+
+init_window(screenWidth, screenHeight, 'raylib [shapes] example - raylib logo using shapes')
+
+set_target_fps(60)  # Set our game to run at 60 frames-per-second
+
+# Main game loop
+while not window_should_close():  # Detect window close button or ESC key
+    # Update
+    # ----------------------------------------------------------------------------------
+    # TODO: Update your variables here
+    # ----------------------------------------------------------------------------------
+
+    # Draw
+    # ----------------------------------------------------------------------------------
+    begin_drawing()
+
+    clear_background(RAYWHITE)
+
+    draw_rectangle(int(screenWidth/2 - 128), int(screenHeight/2 - 128), 256, 256, BLACK)
+    draw_rectangle(int(screenWidth/2 - 112), int(screenHeight/2 - 112), 224, 224, RAYWHITE)
+    draw_text("raylib", int(screenWidth/2 - 44), int(screenHeight/2 + 48), 50, BLACK)
+
+    draw_text("this is NOT a texture!", 350, 370, 10, GRAY)
+
+    end_drawing()
+
+# De-Initialization
+close_window()  # Close window and OpenGL context