build: execute pub get and dart analyzer

When chaining a `pubspec.yaml` we automatically run `pub get`.

In `gulp build` we also run `dartanalyzer` for all files
that have the pattern:

`<module>/lib/<module>.dart`

Closes #13
Closes #5
Closes #2

modules/di/pubspec.yaml

@@ -2,5 +2,7 @@ name: di
 environment:
   sdk: '>=1.4.0'
 dependencies:
+  facade:
+    path: ../facade
 dev_dependencies:
   unittest: '>=0.10.1 <0.12.0'

modules/di/src/module.js

@@ -1,9 +1,9 @@
 import {Type} from 'facade/lang';
 import {Map, MapWrapper wraps Map} from 'facade/collection';
 
-/// becouse we need to know when toValue was not set. 
-/// (it could be that toValue is set to null or undefined in js) 
-var _UNDEFINED = {} 
+/// becouse we need to know when toValue was not set.
+/// (it could be that toValue is set to null or undefined in js)
+var _UNDEFINED = {}
 
 export class Module {
 
@@ -12,12 +12,12 @@ export class Module {
     this.bindings = new MapWrapper();
   }
 
-  bind(type:Type, 
-      {toValue=_UNDEFINED, toFactory, toImplementation, inject, toInstanceOf, withAnnotation}/*:
+  bind(type:Type,
+      {toValue/*=_UNDEFINED*/, toFactory, toImplementation, inject, toInstanceOf, withAnnotation}/*:
         {toFactory:Function, toImplementation: Type, inject: Array, toInstanceOf:Type}*/) {}
 
-  bindByKey(key:Key, 
-      {toValue=_UNDEFINED, toFactory, toImplementation, inject, toInstanceOf}/*:
+  bindByKey(key:Key,
+      {toValue/*=_UNDEFINED*/, toFactory, toImplementation, inject, toInstanceOf}/*:
         {toFactory:Function, toImplementation: Type, inject: Array, toInstanceOf:Type}*/) {}
 
   install(module:Module) {}

modules/facade/test.dart

@@ -1,13 +0,0 @@
-import 'dart:core' as core;
-import 'dart:collection';
-
-class Map  {
-
-  new() => null;
-
-  ping() => core.print('map');
-}
-
-main() {
-  new Map().ping();
-}