chore(core): move compiler out of core

BREAKING CHANGE

All imports from 'angular2/core/compiler' should be changed to 'angular2/compiler'.

modules/angular2/test/core/debug/debug_element_view_listener_spec.ts

@@ -17,7 +17,7 @@ import {global} from 'angular2/src/core/facade/lang';
 import {APP_VIEW_POOL_CAPACITY} from 'angular2/src/core/linker/view_pool';
 import {provide, Component, Directive, Injectable, View} from 'angular2/core';
 import {inspectNativeElement} from 'angular2/src/core/debug';
-import {IS_DART} from '../../platform';
+import {IS_DART} from 'angular2/src/core/facade/lang';
 
 @Component({selector: 'my-comp'})
 @View({directives: []})