Generate CHANGELOG.json files and add convert_changelog script

packages/react-docs/CHANGELOG.json

@@ -0,0 +1,47 @@
+[
+	{
+		"version": "0.0.4",
+		"changes": [
+			{
+				"note": "Handle `reflection` type rendering so that anonymous function type declarations render properly",
+				"pr": "465"
+			},
+			{
+				"note": "Rename `MethodSignature` to `Signature` and change it's props so that it can be used to render method and function signatures.",
+				"pr": "465"
+			},
+			{
+				"note": "Rename `MethodBlock` to `SignatureBlock` since it is not used to render method and function signature blocks.",
+				"pr": "465"
+			},
+			{
+				"note": "Add support for documenting exported functions.",
+				"pr": "465"
+			}
+		]
+	},
+	{
+		"version": "0.0.3",
+		"changes": [
+			{
+				"note": "Move TS typings from devDependencies to dependencies since they are needed by the package user."
+			}
+		],
+		"timestamp": 1521327600,
+		"isPublished": true
+	},
+	{
+		"version": "0.0.2",
+		"changes": [
+			{
+				"note": "Move example out into a separate sub-package"
+			},
+			{
+				"note": "Consolidate all `console.log` calls into `logUtils` in the `@0xproject/utils` package",
+				"pr": "452"
+			}
+		],
+		"timestamp": 1521327600,
+		"isPublished": true
+	}
+]