Rename "roles" to "units". Put units in their own folders.

lib/units/storage/plugins/apk/task/manifest.js

@@ -0,0 +1,19 @@
+var Promise = require('bluebird')
+var ApkReader = require('adbkit-apkreader')
+
+module.exports = function(file) {
+  var resolver = Promise.defer()
+
+  process.nextTick(function() {
+    try {
+      var reader = ApkReader.readFile(file.path)
+      var manifest = reader.readManifestSync()
+      resolver.resolve(manifest)
+    }
+    catch (err) {
+      resolver.reject(err)
+    }
+  })
+
+  return resolver.promise
+}