title: Tabbing visual selection
body: <p>In many GUIs when I select a section of text and then hit the <kbd>Tab</kbd> or <kbd>Shift</kbd>+<kbd>Tab</kbd> button the selected section will indent in or out. </p>
  
  <p>In VIM I can select a visual section and then hit the <kbd>&lt;</kbd> or <kbd>></kbd> key to change indenting, however once I hit the <kbd>&lt;</kbd> key my selection is cleared so I am stuck selecting the section again and hitting <kbd>&lt;</kbd> again. This gets really annoying when I am trying to indent something a few stops in and want visual feedback. </p>
  
  <p>Is there anyway to indent stuff in and out in vim while keeping the current selected text selected? </p>
  
  <p>Is there a trick to re-map <kbd>Tab</kbd> and <kbd>Shift</kbd>+<kbd>Tab</kbd> so they behave in this way in visual mode? </p>