doctest runner for Node (also fix name and version)

bin/doctest

@@ -0,0 +1,20 @@
+#!/usr/bin/env node
+
+var path = require('path');
+var fs = require('fs');
+var root = path.join(path.dirname(fs.realpathSync(__filename)), '..');
+
+var doctest = require(root + '/doctest');
+
+var runner = new doctest.Runner({Reporter: doctest.ConsoleReporter});
+var parser = new doctest.TextParser.fromFile(runner, process.argv[2]);
+parser.parse();
+runner.run();
+var reporter = runner.reporter;
+console.log('Successes:', reporter.successes);
+console.log('Failures:', reporter.failures);
+if ((! reporter.successes) || reporter.failures) {
+  // Set exit code to number of failures (if any). It gives a nice failures
+  // summary when running under make. E.g.: `make: *** [doctest] Error 2`
+  process.exit(reporter.failures || 1);
+}

package.json

@@ -1,7 +1,10 @@
 {
-  "name": "doctest",
-  "version": "0.3",
+  "name": "doctestjs",
+  "version": "0.3.0",
   "main": "doctest",
+  "bin": {
+    "doctest": "./bin/doctest"
+  },
   "description": "Example-based testing framework",
   "keywords": [],
   "author": {