Lots of things

[BlueMoonJune]

• Added a flag to the makefile
• Fixed time behaving strangely, likely not a consistent rate across devices but it is much smoother now
• Added detection for RGBA images and treating them as such
• Overhauled system for text rendering, passed to the same shader with songinfo == 1. use with a vertex shader to position the text. (example in Shaders/fuji.) Still need to implement this for the clock that i think is on black
• Changed the album art to download with .png as the extension, as i found them to be that more often (this was an attempt to solve the problem RGBA was causing)
• Added a script for converting shadertoy shaders, could still use some work probably

Still need to make the album art update

fuji and mandelbulb are not mine

Feel free to accept or reject this PR, I just want to contribute to this program as it's the first I've come across that actually ended up working for me.