Add a README to help with usage.

Author: BluSpring

.gitignore

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 /target
 *.dll
-.idea/
+.idea/
+*.png
+*.yml

README.md

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+# EmaPNGTuberV4
+
+A custom PNGTuber software primarily made for [EmaMae](https://twitch.tv/IAmEmaMae).
+What happened to the other 3 versions? *no.*
+
+## Why?
+I saw Ema have performance issues with the PNGTuber software she was using.
+And of course, with the way I am, I just decided to make my own version for them.
+
+This PNGTuber software seems to have less than 1-2% CPU *and* GPU usage on my computer, and
+less than 90 MB of memory used, though it could potentially be better.
+
+It utilizes a dynamic rendering feature, where the renderer stops rendering if no updates
+are required. This highly helps with the resource usage, especially when idle.
+
+## Usage
+You can right-click on the window to toggle the frame on/off, and if the frame is
+on, it will show the properties button in the top right.
+
+If the PNGTuber avatar is invisible, make sure the threshold is at -30.0 dB.
+
+## Building
+In order to build the project, you must first install the .dll and .lib files required by SDL2.
+<br>
+You can get the files here: [SDL2](https://github.com/libsdl-org/SDL/releases/tag/release-2.30.0) [SDL2_ttf](https://github.com/libsdl-org/SDL_ttf/releases/tag/release-2.22.0) [SDL2_image](https://github.com/libsdl-org/SDL_image/releases/tag/release-2.8.2)
+
+This project was compiled and tested on Windows, but it *might* work on other platforms too with
+some slight modifications.