.tar.gz PowerShell issues fix. (#373)

Author: MauroDruwel

install.bat

@@ -48,7 +48,8 @@ set "URL=%URL%.tar.gz"
 echo Downloading Nitro from: %URL%
 powershell -Command "Invoke-WebRequest -OutFile '%TEMP%\nitro.tar.gz' '%URL%'"
 echo Extracting Nitro...
-powershell -Command "Expand-Archive -Path '%TEMP%\nitro.tar.gz' -DestinationPath '%APPDATA%\nitro'"
+powershell -Command "mkdir '%APPDATA%\nitro'"
+powershell -Command "tar -zxvf '%TEMP%\nitro.tar.gz' -C '%APPDATA%\nitro'"
 
 :: Add nitro to the PATH
 setx PATH "%APPDATA%\nitro;%PATH%"
@@ -61,4 +62,4 @@ echo rmdir /S /Q "%APPDATA%\nitro" >> "%APPDATA%\nitro\uninstallnitro.bat"
 :: Clean up
 del %TEMP%\nitro.tar.gz
 
-endlocal
+endlocal