code: function startWatching(watch_folder, dest_folder){
  
      var watch = require('watch');
      watch.watchTree(watch_folder, function (f, curr, prev) {
          if (typeof f == "object" && prev === null && curr === null) {
  
          // Finished walking the tree
          console.log('finished walking tree');
          
      } else if (prev === null) {
  
          // f is a new file
          console.log('new file: ' + f);
          var real_save_path = realDestinationPath(f, watch_folder, dest_folder);
          if (isDirectory(f, false)){
              //check if directory exists, if not create it
              isDirectory(real_save_path, true); 
          } else{
              //it's a file so let's copy it
              copyFileFrom(f, real_save_path);
          }
  
      } else if (curr.nlink === 0) {
  
          // f was removed
          console.log('removed file');
          if (isDirectory(f, false)){
  
          } else{
              removeFileAtPath(f, dest_folder);   
          }
      } else {
  
          // f was changed
          console.log('changed file f: ' + f);
          var real_save_path = realDestinationPath(f, watch_folder, dest_folder);
          
          if (isDirectory(f, false)){
              //check if directory exists, if not create it
              isDirectory(real_save_path, true); 
          } else{
              //it's a file so let's copy it
              copyFileFrom(f, real_save_path);
          }
      }
      });
  }
docs: functions