Add disableDates option

[jeffreycahyono]

Add disableDates option to prevent user choosing blacklisted dates. Usage example below.

$('#dtp').datetimepicker({
    disableDates : [
        new Date(2013,5-1,30),// Corpus Christi
        new Date(2013,6-1,6), // Isra Miraj
        new Date(2013,7-1,4) // Independence Day
    ] //blockDts
});

The array can also contain date primitive value

$('#dtp').datetimepicker({
    disableDates : [1364490000000, 1368032400000, 1369414800000, 1370451600000, 1375894800000, 1375981200000, 1376672400000, 1381770000000, 1383584400000, 1387904400000]
});