* Bind various keys for advancing slides
* Disable debug font atlas rendering
* Add Handmade-Math dependency for no reason. I only wanted Math for
interpolate. Oh well.
* Add presentation data structure and an example presentation
* Tweaked text placement
* Use the font's default line spacing
* Enable subpixel, even though it doesn't make that big a difference
at my expected font sizes
* Make code font smaller
* Use grayscale by default. My 144 dpi screen makes it not worth it to
do subpixel
* Use SDL2's conversion to get it right. Apparently the endianness
matters even though I provided a mask.
* Use the LCD mode, though I don't think I'm blending correctly. The
color fringing is pretty bad.
* Set my DPI to my actual screen DPI. I believe the results are what I
expect now for font point sizes
* memset() the buffer to avoid noisy data
* Use the pitch value to properly traverse FreeType buffer
I had my alpha inverted from what it should have been. I also didn't
properly set the pixel format. I'm not sure this will work on a
machine with different endianness.
* Load separate font for monospace text
