forEl and ifEl make it more functionality

[souljungkim]

forEl

newEl('div').add([
  newEl('span').html('Hello forEl'),
  forEl(3, function(it){ return newEl('br')  })
]);

ifEl

var statusHealth = true;
newEl('div').add([
  newEl('span').html('Hello ifEl').if(statusHealth, function(it){ it.add(' How are you? ') }),
  forEl(3, function(it){ return newEl('br')  })
]);