Started explaining how to download data file

Refs #54

Author: sverhoeven

Makefile

@@ -56,7 +56,7 @@ site : lesson-md
 docker-serve :
 	docker run --rm -it --volume ${PWD}:/srv/jekyll \
            --volume=${PWD}/.docker-vendor/bundle:/usr/local/bundle \
-           -p 127.0.0.1:4000:4000 \
+           -p 0.0.0.0:4000:4000 \
            jekyll/jekyll:${JEKYLL_VERSION} \
            bin/run-make-docker-serve.sh
 

setup.md

@@ -255,17 +255,21 @@ that you are able to download CMIP data and that you have several GB of space
 available to install conda & ESMValTool, but also enough to make a copy of some
 data.
 
+For this tutorial you can download the required data files by 
+1. Going to https://esgf-data.dkrz.de/projects/esgf-dkrz/ 
+2. Performing the following search
+  * 
+3. Download the NetCDF file to a ~/
+
 You will also need to able to use:
 - git
 - conda
-- synda
 
 #### Linux/Unix
 
 For Linux/Unix systems, please follow the instructions of the [Installation episode]({{
 page.root}}{% link _episodes/02-installation.md  %}).
 
-
 #### Mac OSx
 
 Also, for Mac OSx systems, please follow the instructions of the [Installation episode]({{