Add README, update make and config a hair

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+# Randy's Nose Picker
+A quick and easy color picker for visualizing RGB/HSL
+
+## Use
+Adjust saturation in the big square with `HL`, luminence with `JK`. Or sat with `JK` and luminence with `HL`. I forgot which but now that I think about it, it could go in the config file.
+The hue spectrum slider adjusts with `N/B`.
+Holding either `shift` increases the adjust speed of any other input.
+If it wasn't already obvious, the bottom portion displays the active color in a big square along with RGB and HSL value, in decimal and hex. There is no mouse support as of this release.
+
+## Configure and build
+### Dependencies
+The only real dependencies are SDL2 and SDL2_TTF (for text).
+
+### Configure
+Configuration of UI things is done through source/config.h. Most options will be self-explanatory.
+The only thing you'll *really* need to touch is config_font_path -- you probably don't have iosevka installed. Find a font you like and use it. It looks cool with the Pentiment fonts lol. I'll figure out font lookup later.
+The worst part here is the UI system I cooked up. UI components in the config_layout struct are tabbed to be a bit more clear but their dimensions are adjustable relative to the tab-parent above them, so you can rearrange the UI easily enough to your liking. Adjusting master window sizing might require this.
+
+### Build
+Just `make`, it should go for the base `picker` rule. `picker_debug` is self-explanatory, and `install` will build and chuck into (probably) your path. Likely you'll need sudo for it.
+
+## Why?
+I got annoyed with googling for online color pickers every time I wanted a quick color reference so I cranked this out mostly on a saturday and buzzed. The UI component was the more fun part that I'd like to develop a bit more. But it's enough.