Complete updating slot.

Example:
var eventId: "52fac59f75a885a6259de12a";
var facebookId = "2342344564564564";
$.post('/updateslot', {
  eventId: eventId,
  facebookId: facebookId,
  slot: [ {
    startDate: "2013-12-30",
    startTime: "2014-01-02",
    duration: "2"
    } ] });
Merge branch 'master' of github.com:Cobra-Kao/synckr