anchor.diff:  @rem to echo or not to echo
   @echo off
   @if not "%ECHO%" == "" echo %ECHO% 
  +
  +@rem check if email has been provided
  +if "%1" == "" goto noemail
   
   @rem prepare gh-pages clone directory
   set "CLONE_DIR=%~dp0\tmp"
  
positive.code: 
  @rem commit
  call git add .
  call git commit -q -m "new release published"
  call git push -q
  
negative.code: @rem clone gh-pages
  call git branch -q -D gh-pages
  call git fetch -q origin gh-pages:gh-pages
  call git clone -q -l -s -b gh-pages ../.. "%CLONE_DIR%\gh-pages"
  cd "%CLONE_DIR%\gh-pages"
  
  @rem cleanup old update-site
  