Added installation instructions to README

Author: agg23

README.md

@@ -4,6 +4,15 @@ Ported from the original core developed by [srg320](https://github.com/srg320) (
 
 Please report any issues encountered to this repo. Most likely any problems are a result of my port, not the original core. Issues will be upstreamed as necessary.
 
+## Installation
+
+### Easy mode
+
+I highly recommend the updater tools by [@mattpannella](https://github.com/mattpannella) and [@RetroDriven](https://github.com/RetroDriven). If you're running Windows, use [the RetroDriven GUI](https://github.com/RetroDriven/Pocket_Updater), or if you prefer the CLI, use [the mattpannella tool](https://github.com/mattpannella/pocket_core_autoupdate_net). Either of these will allow you to automatically download and install openFPGA cores onto your Analogue Pocket. Go donate to them if you can
+
+### Manual mode
+To install the core, copy the `Assets`, `Cores`, and `Platform` folders over to the root of your SD card. Please note that Finder on macOS automatically _replaces_ folders, rather than merging them like Windows does, so you have to manually merge the folders.
+
 ## Usage
 
 **NOTE:** ROM files must not contain a SMC header. If a ROM isn't loading and you think it should, check if it has a header with a tool like [Advanced SNES ROM Utility](https://www.romhacking.net/utilities/1638/) and remove it if so.