Add script to set version number

bower.json

@@ -4,7 +4,9 @@
   "main": "dist/planetaryjs.min.js",
   "description": "Awesome interactive globes for the web",
   "homepage": "http://planetaryjs.com",
-  "authors": [ "Brandon Tilley <brandon@brandontilley.com>" ],
+  "authors": [
+    "Brandon Tilley <brandon@brandontilley.com>"
+  ],
   "license": "MIT",
   "ignore": [
     ".git",
@@ -21,8 +23,10 @@
     "topojson": "1.x"
   },
   "keywords": [
-    "globe", "globes",
+    "globe",
-    "planet", "planets",
+    "globes",
+    "planet",
+    "planets",
     "d3",
     "topojson"
   ]

script/set-version

@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+
+var fs = require('fs');
+var spawn = require('child_process').spawn;
+
+var type    = process.argv[2];
+var version = process.argv[3];
+var name    = process.argv[4]
+
+if ("stable" !== type && "unstable" !== type) {
+  console.log("You must specify 'stable' or 'unstable' version type.");
+  process.exit(1);
+}
+
+if (!version) {
+  console.log("You must specify a version.");
+  process.exit(1);
+}
+
+if (version[0] === 'v') {
+  version = version.replace(/^v/, '');
+}
+
+var package = require("../package.json");
+var bower   = require("../bower.json");
+var site    = require("../site/public/download/_data.json");
+
+package.version = version;
+bower.version = version;
+
+site[type].latest = site[type].latest || {};
+site[type].latest.version = "v" + version;
+if (name) site[type].latest.name = name;
+
+fs.writeFileSync('package.json', JSON.stringify(package, null, '  ') + "\n");
+fs.writeFileSync('bower.json', JSON.stringify(bower, null, '  ') + "\n");
+fs.writeFileSync('site/public/download/_data.json', JSON.stringify(site, null, '  ') + "\n");
+
+spawn('npm', ['run', 'build']);
+
+console.log("Tasks:\n\n - Update CHANGELOG.md\n - Regenerate site");