Reverted commit D3618583
Reverted commit D3618583

Summary:
As pointed out by https://flowtype.org/docs/new-project.html#typechecking-your-files all files should use `/* flow */` comment at the top of the file, this PR updates getting starting guide to use `/* flow */` comments
Closes https://github.com/facebook/flow/pull/2131

Differential Revision: D3618583

Pulled By: samwgoldman

fbshipit-source-id: 4c3f21797d554cf918551b0ea0e13144c99f4263

claudiopro/flow,popham/flow,ForbesLindesay/flow,MichaelDeBoey/flow,jamesgpearce/flow,chenglou/flow,JonathanUsername/flow,gabro/flow,jgrund/flow,JonathanUsername/flow,AprilArcus/flow,jgrund/flow,nmote/flow,fletcherw/flow,gabelevi/flow,AgentME/flow,fletcherw/flow,facebook/flow,AgentME/flow,claudiopro/flow,gabro/flow,MichaelDeBoey/flow,MichaelDeBoey/flow,gabelevi/flow,chenglou/flow,mroch/flow,gabelevi/flow,jamesgpearce/flow,jgrund/flow,TiddoLangerak/flow,samwgoldman/flow,JonathanUsername/flow,mroch/flow,jeffmo/flow,ylu1317/flow,samwgoldman/flow,gabro/flow,jdelStrother/flow,samwgoldman/flow,chenglou/flow,chenglou/flow,nmote/flow,claudiopro/flow,nmote/flow,gabelevi/flow,jdelStrother/flow,AprilArcus/flow,jamesgpearce/flow,claudiopro/flow,samwgoldman/flow,samwgoldman/flow,facebook/flow,facebook/flow,ForbesLindesay/flow,ForbesLindesay/flow,jeffmo/flow,AgentME/flow,gabelevi/flow,claudiopro/flow,AgentME/flow,AprilArcus/flow,ylu1317/flow,ForbesLindesay/flow,AprilArcus/flow,facebook/flow,samwgoldman/flow,ylu1317/flow,popham/flow,nmote/flow,jeffmo/flow,jamesgpearce/flow,ylu1317/flow,popham/flow,JonathanUsername/flow,jdelStrother/flow,ForbesLindesay/flow,nmote/flow,TiddoLangerak/flow,jdelStrother/flow,jeffmo/flow,nmote/flow,mroch/flow,popham/flow,mroch/flow,gabro/flow,nmote/flow,gabro/flow,jdelStrother/flow,jamesgpearce/flow,popham/flow,AprilArcus/flow,facebook/flow,ForbesLindesay/flow,jgrund/flow,ylu1317/flow,popham/flow,mroch/flow,mroch/flow,facebook/flow,MichaelDeBoey/flow,JonathanUsername/flow,popham/flow,jgrund/flow,fletcherw/flow,fletcherw/flow,jamesgpearce/flow,JonathanUsername/flow,jdelStrother/flow,facebook/flow,TiddoLangerak/flow,fletcherw/flow,jamesgpearce/flow,chenglou/flow,jgrund/flow,chenglou/flow,samwgoldman/flow,fletcherw/flow,JonathanUsername/flow,gabro/flow,gabelevi/flow,jeffmo/flow,TiddoLangerak/flow,mroch/flow,AprilArcus/flow,MichaelDeBoey/flow,gabelevi/flow,TiddoLangerak/flow,AgentME/flow,jeffmo/flow