chore: install log4js manually (on Node 0.10)

Workaround for https://github.com/isaacs/npm/issues/3305

This is cherry-picked commit from stable branch (707684b)

Conflicts:
	package.json

install-log4js.js

@@ -0,0 +1,7 @@
+// workaround hack for https://github.com/isaacs/npm/issues/3305
+
+var spawn = require('child_process').spawn;
+
+if (/0\.10/.test(process.versions.node)) {
+  spawn('npm', ['install', 'log4js@0.6.1'], {stdio: 'inherit'});
+}

package.json

@@ -116,5 +116,8 @@
   "engines": {
     "node": "~0.8 || ~0.10"
   },
+  "scripts": {
+    "install": "node install-log4js.js"
+    },
   "version": "0.9.0"
 }