build: crossplatform build with packages.

Big thanks to @fg2it who created a POC as
well as the build container that this work
is based on.

scripts/grunt/release_task.js

@@ -3,13 +3,20 @@ var path = require('path');
 module.exports = function(grunt) {
   "use strict";
 
-  // build, then zip and upload to s3
+  // build then zip
   grunt.registerTask('release', [
     'build',
     'build-post-process',
     'compress:release'
   ]);
 
+  // package into archives
+  grunt.registerTask('package', [
+    'clean:temp',
+    'build-post-process',
+    'compress:release'
+  ]);
+
   grunt.registerTask('build-post-process', function() {
     grunt.config('copy.public_to_temp', {
       expand: true,
@@ -18,7 +25,7 @@ module.exports = function(grunt) {
       dest: '<%= tempDir %>/public/',
     });
     grunt.config('copy.backend_bin', {
-      cwd: 'bin',
+      cwd: 'bin/<%= platform %>-<%= arch %>',
       expand: true,
       src: ['*'],
       options: { mode: true},