Add Zenodo json and badge

.zenodo.json

@@ -0,0 +1,31 @@
+{
+  "description": "Julia's CUTEst Interface",
+  "license": "LGPLv3",
+  "title": "JuliaSmoothOptimizers/CUTEst.jl: v0.3.0",
+  "version": "v0.3.0",
+  "upload_type": "software",
+  "publication_date": "2018-03-05",
+  "creators": [
+    {
+      "affiliation": "Federal University of Paraná - UFPR",
+      "name": "Abel Soares Siqueira"
+    },
+    {
+      "affiliation": "École Polytechnique - Montreal",
+      "name": "Dominique Orban"
+    }
+  ],
+  "access_right": "open",
+  "related_identifiers": [
+    {
+      "scheme": "url",
+      "identifier": "https://github.com/JuliaSmoothOptimizers/CUTEst.jl/tree/v0.3.0",
+      "relation": "isSupplementTo"
+    },
+    {
+      "scheme": "doi",
+      "identifier": "10.5281/zenodo.1188851",
+      "relation": "isPartOf"
+    }
+  ]
+}

README.md

@@ -5,7 +5,7 @@ constrained and unconstrained nonlinear programming problems for testing and
 comparing optimization algorithms, derived from the abstract model on
 [NLPModels](https://github.com/JuliaSmoothOptimizers/NLPModels.jl).
 
-### Stable release [![Github release](https://img.shields.io/github/release/JuliaSmoothOptimizers/CUTEst.jl.svg)](https://github.com/JuliaSmoothOptimizers/CUTEst.jl/releases/latest)
+### Stable release [![Github release](https://img.shields.io/github/release/JuliaSmoothOptimizers/CUTEst.jl.svg)](https://github.com/JuliaSmoothOptimizers/CUTEst.jl/releases/latest) [![DOI](https://zenodo.org/badge/30661559.svg)](https://zenodo.org/badge/latestdoi/30661559)
 
 - Documentation: [![Documentation](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaSmoothOptimizers.github.io/CUTEst.jl/stable)
 - Package Evaluator: [![CUTEst.jl](https://pkg.julialang.org/badges/CUTEst_0.5.svg)](https://pkg.julialang.org/?pkg=CUTEst)