update readme + add zenodo metadata file [skip ci]

Author: dmey

.zenodo.json

@@ -0,0 +1,32 @@
+{
+    "title": "WPS-CMake",
+    "description": "<p>WPS-CMake adds CMake support to the latest versions of the WRF Preprocessing System (WPS). This page is used to maintain a permanent DOI for versions of WPS-CMake. For information about WPS-CMake, please refer to the <a href='https://github.com/WRF-CMake/wps#readme'>WPS-CMake repository on GitHub</a>.</p>",
+    "keywords": [
+        "cmake",
+        "fortran",
+        "meteorology",
+        "weather",
+        "modelling",
+        "nwp",
+        "wps"
+    ],
+    "upload_type": "software",
+    "access_right": "open",
+    "license": "MIT",
+    "creators": [
+        {
+            "orcid": "0000-0003-3299-1382",
+            "name": "Riechert, M."
+        },
+        {
+            "orcid": "0000-0002-7071-7547",
+            "name": "Meyer, D."
+        }
+    ],
+    "related_identifiers": [
+        {
+            "relation": "isSupplementedBy",
+            "identifier": "10.21105/joss.01468"
+        }
+    ]
+}

README.md

@@ -1,7 +1,14 @@
-# WPS-CMake [![Build status Appveyor](https://ci.appveyor.com/api/projects/status/8axylclvn10h32kk/branch/wps-cmake?svg=true)](https://ci.appveyor.com/project/WRF-CMake/wps/branch/wps-cmake) [![Build Status Travis CI](https://travis-ci.com/WRF-CMake/wps.svg?branch=wps-cmake)](https://travis-ci.com/WRF-CMake/wps) [![Build Status Azure Pipelines](https://dev.azure.com/WRF-CMake/wrf/_apis/build/status/WPS%20(full)?branchName=wps-cmake)](https://dev.azure.com/WRF-CMake/wrf/_build/latest?definitionId=6&branchName=wps-cmake)
+# WPS-CMake
+[![Build status Appveyor](https://ci.appveyor.com/api/projects/status/8axylclvn10h32kk/branch/wps-cmake?svg=true)](https://ci.appveyor.com/project/WRF-CMake/wps/branch/wps-cmake) [![Build Status Travis CI](https://travis-ci.com/WRF-CMake/wps.svg?branch=wps-cmake)](https://travis-ci.com/WRF-CMake/wps) [![Build Status Azure Pipelines](https://dev.azure.com/WRF-CMake/wrf/_apis/build/status/WPS%20(full)?branchName=wps-cmake)](https://dev.azure.com/WRF-CMake/wrf/_build/latest?definitionId=6&branchName=wps-cmake)
 
+## Installation
 
-**Please see the [WRF-CMake repository](https://github.com/WRF-CMake/wrf#readme) for information on how to install WPS-CMake**
+Please see the [WRF-CMake repository](https://github.com/WRF-CMake/wrf#installation) for information on how to install WPS-CMake.
+
+
+## How to cite
+Permanent DOIs for versions of the WPS-CMake extension are avalable on Zenodo at XXX.
+For information on how to cite WRF-CMake, please see the [How to cite section](https://github.com/WRF-CMake/wrf#how-to-cite) in the WRF-CMake repository.
 
 
 ## Changes to be upstreamed