Merge pull request #67 from dawndiy/master

文字勘误
Fix 职责
修改更新 guides/getting-started/index.md
修改更新 /guides/getting-started/planning-the-application.md
更新 guides/getting-started/creating-a-static-mockup.md
修改更新 guides/getting-started/obtaining-emberjs-and-dependencies.md
guides/getting-started 与官网同步，更新翻译