Set up spec Project as telepath model

spec/spec-helper.coffee

@@ -47,10 +47,8 @@ if specDirectory = atom.getLoadSettings().specDirectory
 
 beforeEach ->
   $.fx.off = true
-  if specProjectPath
-    atom.project = new Project(specProjectPath)
-  else
-    atom.project = new Project(path.join(@specDirectory, 'fixtures'))
+  projectPath = specProjectPath ? path.join(@specDirectory, 'fixtures')
+  atom.project = atom.getWindowState().set('project', new Project(path: projectPath))
   window.project = atom.project
 
   window.resetTimeouts()

src/project.coffee

@@ -209,9 +209,9 @@ class Project extends Model
 
   # Private: DEPRECATED
   buildBufferSync: (absoluteFilePath) ->
-    buffer = new TextBuffer({project: this, filePath: absoluteFilePath})
-    buffer.loadSync()
+    buffer = new TextBuffer({filePath: absoluteFilePath})
     @addBuffer(buffer)
+    buffer.loadSync()
     buffer
 
   # Private: Given a file path, this sets its {TextBuffer}.