Updates README.md with makefile info #398

Author: jasonb5

README.md

@@ -1,11 +1,40 @@
+# CDMS2
+
 ### Builds
 [![CircleCI](https://circleci.com/gh/CDAT/cdms.svg?style=svg)](https://circleci.com/gh/CDAT/cdms)
 [![Coverage Status](https://coveralls.io/repos/github/CDAT/cdms/badge.svg)](https://coveralls.io/github/CDAT/cdms)
-[![TravisCI](https://travis-ci.org/CDAT/cdms.svg?branch=master)](https://travis-ci.org/CDAT/cdms/builds)
 ![platforms](http://img.shields.io/badge/platforms-linux%20|%20osx-lightgrey.svg)
 
 
 ### Anaconda
 [![Anaconda-Server Badge](https://anaconda.org/uvcdat/cdms2/badges/version.svg)](https://anaconda.org/uvcdat/cdms2)
 [![Anaconda-Server Badge](https://anaconda.org/uvcdat/cdms2/badges/downloads.svg)](https://anaconda.org/uvcdat/cdms2)
 [![Anaconda-Server Badge](https://anaconda.org/uvcdat/cdms2/badges/installer/conda.svg)](https://conda.anaconda.org/uvcdat)
+
+# Building conda package
+
+```bash
+make dev-build
+```
+
+## Build in docker container
+```bash
+make dev-docker
+```
+
+# Makefile targets
+
+- **conda-info**: Runs `conda info` in the test environment.
+- **conda-list**: Runs `conda list` in the test environment.
+- **dev-docker**: Builds dev environment in a docker container.
+- **dev-docker-run**: Will run docker container.
+- **dev-environment**: Will create dev environment using local conda.
+- **dev-install**: Builds and installs CDMS2 in dev environment. Run this after making any code changes.
+- **setup-build**: Clones CDAT/conda-recipes into workdir.
+- **setup-tests**: Creates test environment using local conda.
+- **conda-rerender**: Rerenders conda recipe using conda smithy.
+- **conda-build**: Builds conda recipe.
+- **conda-upload**: Uploads conda build artifacts.
+- **conda-dump-env**: Dumps test environment using `conda list --explicit`, this generates a file with the specific files installed.
+- **run-tests**: Runs units tests in test environment.
+- **run-coveralls**: Runs coverage in test environment.