anchor.diff:  if exist extensions\viewerZIP\ (
       cd extensions\viewerZIP
       call git fetch --all
  -    cd ..\..
   ) else (
       call git clone https://github.com/tagspaces/viewerZIP.git extensions\viewerZIP
  -)
  +    cd extensions\viewerZIP
  +)
  +call bower link
  +cd ..\..
   
   REM -------------------------
   REM viewerPDF
  
positive.code: if exist extensions\editorText\ (
      cd extensions\editorText
      call git fetch --all
      cd ..\..
  ) else (
      call git clone https://github.com/tagspaces/editorText.git extensions\editorText
  )
  
  REM -------------------------
  REM viewerEPUB
  
negative.code: if exist extensions\perspectiveList\ (
      cd extensions\perspectiveList
      call git fetch --all
  ) else (
      call git clone https://github.com/tagspaces/perspectiveList.git extensions\perspectiveList
      cd extensions\perspectiveList
  )
  call bower link
  cd ..\..
  
  REM -------------------------
  REM perspectiveGraph
  