More information about ED can be found in the paper written by Moorcroft et al.
r956 aka 0c1bf644bd377bc0636c4f612b6f766f8e682599 from April 9th, is considered "somewhat stable", see report: https://github.com/EDmodel/ED2Documents/blob/master/EDTS/r956vr922rapid.pdf
This document describes the contents of the folders containing the ED code. You should have a directory called ED with the following structure:
ED: This directory contains the ED source code (src) and the directory for compilation (build). For further instructions on how to compile and use the model, we strongly suggest accessing the ED Wiki website: https://github.com/EDmodel/ED2/wiki
RAPP: This directory contains the NCEP reanalysis pre-processor, that produces meteorological forcing in the ED-friendly format (HDF5) based on the NCEP/NCAR reanalysis (Kalnay et al 1996). The source code (src) and a build directory are included. The run directory contains the namelist and a shell script to help with the downloading process. A brief instruction can be found in the directory too.