Given a birthdate in DD-MMM-YYYY format, compute the next 1000-day birthday milestone. For example, Abraham Lincoln was born on 12-Feb-1809, and if he was still alive, he would turn 75000 days old on 17-Jun-2014.
[nDays,dateStr] = compute_next_birthday_milestone('12-Feb-1809');
nDays = 75000 dateStr = '17-Jun-2014'
Bonus points if you can correctly identify the people associated with the birthdates in the test suite.