support for package mappings, use new install receipt format

lib/index.js

@@ -35,23 +35,25 @@ var async           = require('async')
         , installedIds = []
 
         , install = function (ids, callback) {
-            repository.install(ids, function (err, ids, roots) {
+            repository.install(ids, function (err, receipts) {
               if (err) return callback(err) // wrapped in ender-repository
 
-              installedIds = installedIds.concat(ids)
-
               // Unmemoize all the packages we just installed
-              roots.forEach(enderPackage.unloadPackage)
+              receipts.forEach(function (receipt) {
+                installedIds.push(receipt.id)
+                enderPackage.unloadPackage(receipt.root)
+                enderPackage.addPackageMapping(receipt.source, receipt.root)
+              })
 
-              callback(null, ids, roots)
+              callback(null, receipts)
             })
           }
 
         , installRest = function (callback) {
             async.whilst(
                 function () { return missing.length }
               , function (callback) {
-                  install(missing, function (err, installedIds) {
+                  install(missing, function (err) {
                     if (err) return callback(err)
                     updateMissing(callback)
                   })
@@ -76,9 +78,9 @@ var async           = require('async')
         , installBasePackages = function (callback) {
             var installPackage = function (id, callback) {
                   var doInstall = function () {
-                        install([ id ], function (err, installedIds) {
+                        install([ id ], function (err) {
                           if (err) return callback(err)
-                          callback(null, installedIds.pop())
+                          callback(null, installedIds[installedIds.length-1])
                         })
                       }