Change rotation direction to clockwise

[einarf]

All things in arcade should rotate clockwise. Closes #1088

• Text is already rotating clockwise

Core stuff

• Sprite shader rotation change
• Hit box rotation direction
• ShapeElementList angle clockwise
• Pymunk hit boxes clockwise
• Sprite velocity / angle_change / update method
• math.rotate_point

Draw commands :

• draw_arc_filled
• draw_arc_outline
• draw_parabola_filled
• draw_parabola_outline
• draw_circle_filled
• draw_circle_outline
• draw_ellipse_filled
• draw_ellipse_outline
• draw_line_strip
• draw_line
• draw_lines
• draw_point
• draw_points
• draw_polygon_filled
• draw_polygon_outline
• draw_triangle_filled
• draw_triangle_outline
• draw_lrtb_rectangle_outline
• draw_xywh_rectangle_outline
• draw_rectangle_outline
• draw_lrtb_rectangle_filled
• draw_xywh_rectangle_filled
• draw_rectangle_filled
• draw_scaled_texture_rectangle
• draw_texture_rectangle
• draw_lrwh_rectangle_textured

Shape list create methods

• create_ellipse
• create_ellipse_filled
• create_ellipse_filled_with_colors
• create_ellipse_outline
• create_line
• create_line_generic
• create_line_generic_with_colors
• create_line_loop
• create_line_strip
• create_lines
• create_lines_with_colors
• create_polygon
• create_rectangle
• create_rectangle_filled
• create_rectangle_filled_with_colors
• create_rectangle_outline
• create_rectangles_filled_with_colors
• create_text_sprite
• create_triangles_filled_with_colors

Examples to update (there are probable more of them)

• asteroid_smasher.py
• sprite_rotate_around_point.py
• sprite_health.py
• sprite_bullets.py
• sprite_bullets_random.py
• sprite_bullets_periodic.py
• sprite_bullets_enemy_aims.py
• sprite_rotate_around_tank.py
• sprite_move_angle.py
• sprite_explosion_particles.py
• sprite_explosion_bitmapped.py