18.1.0

• bn::blending::set_transparency_and_intensity_alpha added.
• bn::timer::elapsed_ticks_with_restart added.
• bn::timers::ticks_per_second added.
• BN_CFG_TIMER_FREQUENCY added.
• bn::timer overflow fixed.
• bn::degrees_lut_sin, bn::degrees_lut_cos and bn::degrees_lut_sin_and_cos optimized.
• Color palettes, sprite tiles and audio management ROM usage reduced.
• timer example added.
• Is there a way to get the bn::sprite_item used to create a bn::sprite_ptr? question added to the Frequently asked questions (FAQ) page.
• GBA pseudo-3D demo added to the README.md.