There are a few small issues to be answered when installing magento2.0

See the online tutorial inside Magento code in the Setup folder there is Composer.json this file,

But for the setup under the hair github above is not, is it the latest code to put it in the root directory that?

But when you copy it to setup for Mao, the following issues occur when you proceed to PHP Composer.phar install?

The main thing is not clear why not composer.json this file, where to find back? Find out if there is a problem with figure three, what should I do?
If you don't understand my question, then give me a guide. How to properly install the latest Magento on GitHub (local environment is the Phpstudy integrated environment, the online server is lamp)

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See the online tutorial inside Magento code in the Setup folder there is Composer.json this file,

But for the setup under the hair github above is not, is it the latest code to put it in the root directory that?

But when you copy it to setup for Mao, the following issues occur when you proceed to PHP Composer.phar install?

The main thing is not clear why not composer.json this file, where to find back? Find out if there is a problem with figure three, what should I do?
If you don't understand my question, then give me a guide. How to properly install the latest Magento on GitHub (local environment is the Phpstudy integrated environment, the online server is lamp)

• Composer.json file under the Setup folder

  This should be a legacy of history, and from the GitHub log, the file was removed from the 2014-12-12 version. As a result, the tutorials you follow may be somewhat outdated.

• Composer require user name and password during installation
  You can refer to this article: Install Deployment with composer Magento2

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