README.md (and included Installation docs) missing from master branch

[j13k]

I had to search for a while to find documention about the installation process.

It seems the Markdown version of the README file in commit cf99772 contains this information in lines 84–117:

frangipanni/README.md

Lines 84 to 117 in cf99772

	# Download and Installation
	## Pre-Compiled Binaries
	You can download executables of `frangipanni` from the Github repository in the [Releases area.](https://github.com/birchb1024/frangipanni/releases) You will find archive files containing the binary and Lua files:
	```
	frangipanni_darwin_amd64.zip
	frangipanni_freebsd_amd64.zip
	frangipanni_js_wasm.zip
	frangipanni_linux_386.tgz
	frangipanni_linux_amd64.tgz
	frangipanni_linux_arm64.tgz
	frangipanni_netbsd_amd64.zip
	frangipanni_openbsd_amd64.zip
	frangipanni_windows_386.zip
	frangipanni_windows_amd64.zip
	```
	Download the file for your operating system and hardware, then decompress the archive in a directory. Ensure the binary file is executable, and you're ready to go. Your directory should look something like this, depending on operating system:
	```
	.
	├── [-rwxrwxr-x] frangipanni_linux_arm64
	├── [-rw-rw-r--] json.lua
	├── [-rw-rw-r--] markdown.lua
	└── [-rw-rw-r--] xml.lua
	```
	I have tested `frangipanni_linux_amd64`, the others are output from the Go cross-compiler and are provided 'as-is'. Please send a Pull Request if you find an issue.
	## Building From Source Code
	If there is no pre-compiled binary or your platform, you can compile from the source. First you need [the 'Go' compiler](https://golang.org/doc/install), version 1.15.2 or greater. After cloning [the frangipanni repository](https://github.com/birchb1024/frangipanni) with git, it suffices to run `GO111MODULE=on go build` and the executable will be built as `frangipanni`. You can run the regression test suite with `test/confidence.sh`, but first install `jp` from [github.com/jmespath/jp](https://github.com/jmespath/jp).
	Read all about `Go` here: [golang.org](https://golang.org/)

But the default README in master (README.org?), which is the default one rendered for the GitHub project, doesn't seem to include this information.