fix posh-git ssh-agent not work "ssh-agent" not work because "posh-git" assert "ssh-agent " start up work already finish

xxx.ps1

#https://github.com/dahlbyk/posh-git.git
#http://markembling.info/2009/09/ssh-agent-in-powershell
#download http://gist.github.com/187305
#help resource
#http://haacked.com/archive/2011/12/19/get-git-for-windows.aspx 
#https://help.github.com/articles/working-with-ssh-key-passphrases
#http://www.codeproject.com/Articles/292855/Setting-Up-Git-in-Windows-with-Diffmerge-Powershel

#solution 1  ---> install github windows 1.x  you can select powershell shell 

#solution 2 
#modify profile
#step 1 download download http://gist.github.com/187305  ps1 file put somewhere 
#add  four cmdlets let ssh-agent-utils work     
New-Alias git 'D:\Program Files\msysgit\cmd\git.exe'
New-Alias ssh 'D:\Program Files\msysgit\bin\ssh.exe'
New-Alias ssh-agent 'D:\Program Files\msysgit\bin\ssh-agent.exe'
New-Alias ssh-add 'D:\Program Files\msysgit\bin\ssh-add.exe'

# include help function  setup ssh-agent
. (Resolve-Path $env:USERPROFILE\Documents\WindowsPowershell\ssh-agent-utils.ps1)
# posh-git include 
. '..posh-git\profile.example.ps1'

#done