越来越多的程序把sourcecode和安装包托管到GitHub上，没有GitHub访问的网络太悲催了。。。
想通过Chocolatey（windows版的apt-get）装一个ConEmu都无法做到
Attempt to get headers for https://github.com/Maximus5/ConEmu/releases/download/v16.05.29/ConEmuSetup.160529.exe failed.
Exception calling "GetResponse" with "0" argument(s): "The operation has timed out"
Downloading ConEmu 64 bit
from 'https://github.com/Maximus5/ConEmu/releases/download/v16.05.29/ConEmuSetup.160529.exe'
Exception calling "Read" with "3" argument(s): "Unable to read data from the transport connection: An existing connection was forci