Bump version to 0.2.1 (#852)

* Set VERSION to 0.2.1.
* Add .zenodo.json metadata file which will hopefully ease our auto-DOI-publishing woes.
* Remove .json from .gitignore.

.gitignore

@@ -24,9 +24,6 @@
 # tar files
 *.tar
 
-# json files
-*.json
-
 # generated when making on os x
 *.dSYM
 

.zenodo.json

+{
+    "license": {
+	"id": "BSD-3-Clause"
+    },
+    "grants": [
+	{
+	    "code": "785907",
+	    "links": {
+		"self": "https://zenodo.org/api/grants/10.13039/501100000780::785907"
+	    },
+	    "title": "Human Brain Project Specific Grant Agreement 2",
+	    "acronym": "HBP SGA2",
+	    "program": "H2020",
+	    "funder": {
+		"doi": "10.13039/501100000780",
+		"acronyms": [
+		    "EC"
+		],
+		"name": "European Commission",
+		"links": {
+		    "self": "https://zenodo.org/api/funders/10.13039/501100000780"
+		}
+	    }
+	}
+    ],
+    "creators": [
+	{
+	    "affiliation": "CSCS",
+	    "name": "Nora Abi Akar"
+	},
+	{
+	    "affiliation": "CSCS",
+	    "name": "John Biddiscombe"
+	},
+	{
+	    "affiliation": "CSCS",
+	    "name": "Benjamin Cumming"
+	},
+	{
+	    "affiliation": "University of Stuttgart",
+	    "name": "Felix Huber"
+	},
+	{
+	    "affiliation": "CSCS",
+	    "name": "Marko Kabic"
+	},
+	{
+	    "affiliation": "CSCS",
+	    "name": "Vasileios Karakasis"
+	},
+	{
+	    "affiliation": "FZJ",
+	    "name": "Wouter Klijn"
+	},
+	{
+	    "orcid": "0000-0002-8172-7791",
+	    "affiliation": "FZJ",
+	    "name": "Anne Küsters"
+	},
+	{
+	    "orcid": "0000-0002-3453-310X",
+	    "affiliation": "FZJ",
+	    "name": "Alexander Peyser"
+	},
+	{
+	    "orcid": "0000-0002-9447-6653",
+	    "affiliation": "CSCS",
+	    "name": "Stuart Yates"
+	},
+	{
+	    "affiliation": "Universität Heidelberg",
+	    "name": "Eric Müller"
+	}    
+    ],
+}

VERSION

-0.2.1-dev
+0.2.1