Update README.md with conda instructions

README.md

 # CSM-CameraModel
 
+## Building with conda
+
+Install conda if you do not already have it.
+```bash
+wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
+bash miniconda.sh -b
+```
+> You can add a `-p <install-prefix>` to choose where to install miniconda. By default, it will install it to `$HOME/miniconda3`.
+
+### Setting up conda for bash
+Copy and paste the following into a terminal running the `bash` shell:
+```bash
+echo -e "\n\n# Adding miniconda3 to PATH" >> $HOME/.bashrc && \
+echo -e "export PATH=$HOME/miniconda3/bin:\$PATH" >> $HOME/.bashrc && \
+source $HOME/.bashrc && \
+which conda
+```
+> [bash installation reference](https://conda.io/docs/user-guide/install/linux.html "Reference to bash conda install")
+
+### Setting up conda for tcsh
+Copy and paste the following into a terminal running the `tcsh` shell:
+```tcsh
+echo  "\n\n# Setting up miniconda3 for tcsh" >> $HOME/.cshrc && \
+echo  "source $HOME/miniconda3/etc/profile.d/conda.csh > /dev/null" >> $HOME/.cshrc && \
+source $HOME/.cshrc && \
+which conda
+```
+> [tcsh installation reference](https://github.com/ESMValGroup/ESMValTool/issues/301 "Reference to tcsh conda install")
+
+### Creating an isolated conda environment
+Run the following commands to create a self-contained dev environment for CSM-CameraModel (type `y` to confirm creation):
+```bash
+conda create -n csmdev -c usgs-astrogeology cmake libcsm
+```
+
+#### Activating the environment
+After creating the `csmdev` environment and installing cmake and libcsm into it, we need to activate it. Right now, cmake, libcsm, and their dependencies are isolated to a conda environment and we need to tell conda that we want to use it. The activation command depends on your shell.
+* **bash**: `source activate csmdev`
+* **tcsh**: `conda activate csmdev`
+
+After you've set up conda, you can build CSM-CameraModel:
+```bash
+
+```
+
+---
+
+## Building without a package manager
 To build:
 
 1. Install [libcsmapi](https://github.com/sminster/csm "CSM API")
@@ -14,9 +62,9 @@ make -f Makefile.linux64 all install clean INSTDIR="$csmenv"
 2. Install cmake >= 3.10
 ```bash
 cd $HOME
-wget https://cmake.org/files/v3.10/cmake-3.10.0-Linux-x86_64.tar.gz
-tar xzf cmake-3.10.0-Linux-x86_64.tar.gz
-rsync -azv cmake-3.10.0-Linux-x86_64/ $HOME/csmenv/
+wget https://cmake.org/files/v3.12/cmake-3.12.0-Linux-x86_64.tar.gz
+tar xzf cmake-3.12.0-Linux-x86_64.tar.gz
+rsync -azv cmake-3.12.0-Linux-x86_64/ $HOME/csmenv/
 echo -e "\n#Prepending csm env to path\nsetenv PATH "$HOME/csmenv/bin:$PATH" >> $HOME/.cshrc
 source $HOME/.cshrc
 ```