Update slot info.

Example:

post to "/addslot/<eventId>/<facebookId>"

slot = { startDate: '2014-02-04', startTime: '2014-02-06', duration: '2' };
$.post('/addslot/52fac59f75a885a6259de12a/2342344564564564', slot);
Merge branch 'master' of github.com:Cobra-Kao/synckr