Updates Dev Doc for M3 Release

A few errors in the dev doc were causing problems with deploying
a dev env. The dev dos has been updated with the correct steps for
prep'ing a host for running Kolla. Additionally, wording has been
added to reference the Heat template for dev env deployment.

Change-Id: I9f0ba1bd2deca490a72b3c54cb1a7df386228ee8

docs/developer-env.md

-# Developer env
+# Developer Environment
+
+If you are developing Kolla on an existing OpenStack cloud
+that supports Heat, then follow the Heat template [README][].
+Otherwise, follow the instructions below to manually create
+your Kolla development environment.
+
+[README]: https://github.com/stackforge/kolla/tree/version-m3/devenv/README.md
 
 In order to run Kolla, it is mandatory to run a version of
 `docker-compose` that includes pid: host support.  One of the
@@ -11,10 +18,12 @@ The pull request is:
 
 Until then, it must be retrieved via git and installed:
 
-    git pull http://github.com/sdake/fig
+    git clone http://github.com/sdake/fig
     cd fig
-    sudo pip install .
+    sudo pip install -e .
     sudo pip install -U docker-py
+    sudo pip install -e .
+    sudo pip install six==1.7.3
 
 The docker-compose version available via the sdake repository has been
 rebased on to a master version of docker-compose which requires the
@@ -23,10 +32,16 @@ packaging and is only available by building from source.  Docker also
 distributes pre-built binaries for docker.  It is recommended to just run
 the docker provided binaries rather then building from source:
 
+If a version of Docker other than 1.5.0-dev is currently running
+on your system, stop it:
+
     sudo systemctl stop docker
     sudo killall -9 docker
-    curl https://master.dockerproject.com/linux/amd64/docker-1.5.0-dev -o docker-dev
-    sudo ./docker-dev -d
+
+Next, download and run the Docker 1.5.0-dev binary:
+
+    wget https://master.dockerproject.com/linux/amd64/docker-1.5.0-dev -O docker
+    sudo ./docker -d &
 
 The basic starting environment will be created using `docker-compose`.
 This environment will start up the openstack services listed in the
@@ -55,19 +70,22 @@ If you want to start a container set by hand use this template
 
 # Debug
 
+All Docker commands should be run from the directory of the Docker binary,
+by default this is `/`.
+
 You can follow a container's status by doing
 
-    $ sudo docker ps -a
+    $ sudo ./docker ps -a
 
 If any of the containers exited you can check the logs by doing
 
-    $ sudo docker logs <glance-api-container>
+    $ sudo ./docker logs <glance-api-container>
     $ docker-compose logs <glance-api-container>
 
 If you want to start a individual service like `glance-api` by hand, then use
 this template.  This is a good method to test and troubleshoot an individual
 container.
 
-    $ docker run --name glance-api -d \
+    $ sudo ./docker run --name glance-api -d \
              --net=host
              --env-file=openstack.env kollaglue/fedora-rdo-glance-api:latest