Update user guide document as the new configure steps

doesn't work in non-english environments.

  Add ipwin functioin to install a tap-window driver and rename connection name

Change default install path to c:\slapos-node

Remove duplicate files in the setup scripts

Don't add account "slaproot" in the slapos-configure
Start cron as service other than job
Don't add slapos-configure as Windows startup item

Remove users and groups added by slapos when unininstall slapos node

  Move all the scripts to /usr/bin

Remove init-slapos-node.sh

Change startup item name from SlapOS-Node to slapos-configure
Check Administrator right before run configure scripts
Add alias of software to client configure file
Run re6stnet as cygwin service on demand