title: ANDROID - Calendar multi date selection on touch (without `DatePicker`)
body: <p>Is it possible to have a <code>CustomCalendar</code>created and enable a <code>multi-selection</code> kind of thing (like the photo gallery) to select <code>multiple dates on touch</code>?</p>
  
  <p>What I was thinking is when oppening the <code>Activity</code>, the <code>Calendar</code>will show and in that phase it allows to choose several days of the current month by touching on the dates...</p>
  
  <p>...is it 'do-able'? </p>
  
  <p>Thanks in advance!</p>