usage:
 nps.exe "{powershell single command}"
 nps.exe "& {commands; semi-colon; separated}"
 nps.exe -encodedcommand {base64_encoded_command}
 nps.exe -encode "commands to encode to base64"
 nps.exe -decode {base64_encoded_command}

 c:\Downloads>nps.exe Get-Date
 12/18/2015 2:19:37 PM

 c:\Downloads>nps.exe "& Get-Date; Write-Output 'Ohai there'"
 12/18/2015 2:19:49 PM
 Ohai there

 c:\Downloads>nps.exe -encode "& Get-Date; Write-Output 'Ohai there'"
 JgAgAEcAZQB0AC0ARABhAHQAZQA7ACAAVwByAGkAdABlAC0ATwB1AHQAcAB1AHQAIAAnAE8AaABhAGkAIAB0AGgAZQByAGUAJwA=

 c:\Downloads>nps.exe -decode JgAgAEcAZQB0AC0ARABhAHQAZQA7ACAAVwByAGkAdABlAC0ATwB1AHQAcAB1AHQAIAAnAE8
 AaABhAGkAIAB0AGgAZQByAGUAJwA=
 & Get-Date; Write-Output 'Ohai there'

 c:\Downloads>nps.exe -encodedcommand JgAgAEcAZQB0AC0ARABhAHQAZQA7ACAAVwByAGkAdABlAC0ATwB1AHQAcAB1AHQ
 AIAAnAE8AaABhAGkAIAB0AGgAZQByAGUAJwA=
 12/18/2015 2:20:19 PM
 Ohai there

 c:\Downloads>powershell.exe -noprofile -encodedcommand JgAgAEcAZQB0AC0ARABhAHQAZQA7ACAAVwByAGkAdABlA
 C0ATwB1AHQAcAB1AHQAIAAnAE8AaABhAGkAIAB0AGgAZQByAGUAJwA=

 Friday, December 18, 2015 2:20:30 PM
 Ohai there