Merge remote-tracking branch 'origin/master'

* origin/master:
  Reformat project
  Remove html-inverting js
  Organize files in packages
  The actionbar title is now clickable
  Added persistent fullscreen
  Added persistent fullscreen
  Add 'sc' and 'lki' UI languages
  Update of the UI translations
  Update meta data of custom Android apps
  Add VAR HTTP-HEADER if necessary
  Make the app movable to the sd card
  Update UI translations
  Windows FSJ-Lite ZIM file splitter is not available anymore, replace it in the help with 'JS-SplitD'
  Beautify bookmark XML file
  Fix selection color problem with library buttons
  Revised the instructions for OS X
  Bump up Android version

src/server/kiwix-serve.cpp

@@ -416,6 +416,7 @@ static int accessHandlerCallback(void *cls,
 
     /* Add if necessary the content-encoding */
     if (deflated) {
+      MHD_add_response_header(response, MHD_HTTP_HEADER_VARY, "Accept-Encoding");
       MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_ENCODING, "deflate");
     }