add README instructions

Author: iw0nderhow

README.md

@@ -0,0 +1,31 @@
+# pulseandroid
+pulseaudio on a smartphone
+
+## How to make it work
+
+### Prerequisites
+You will need:
+
+* an Android phone running [Android 7.0.0 or higher](https://wiki.termux.com/wiki/FAQ#What_are_system_requirements)
+* [Termux](https://termux.com/)
+* [Termux:Boot](https://wiki.termux.com/wiki/Termux:Boot)
+
+### Packages
+1. After installing Termux, open it and enter:
+
+   ```sh
+   pkg update -y
+   pkg add openssh termux-services pulseaudio
+   rm $PREFIX/var/service/sshd/down
+   ```
+   
+1. Copy the files in `home/` to `$HOME` and the `etc/` and `usr/` directories to `$PREFIX`.
+
+1. If you wish to access the device using SSH, make note of the username (obtainable using `echo $USER`).
+
+1. Start *Termux:Boot* once.
+
+1. Restart the device.
+
+   You may need to open Termux again to grant background-running privileges.
+