Implement datetimepicker-append-to-body

[zdila]

Currently datetimepicker is unusable in smaller dialogs because it can't overflow its ancestor div with overflow:scroll (or overflow:hidden).

For example ui.bootstrap.datepicker is capable of that with datepicker-append-to-body attribute.

[zdila]

Another solution uses position:fixed - see plunkers referenced from angular-ui/ui-select#41

[dalelotts]

I'm sorry, I'm pretty slammed lately and have not gotten to this - can someone please provide a fiddle that demonstrates the problem and also submit a PR to fix this?

[dalelotts]

I added table-responsive to the template - please create a fiddle using 0.3.0 if that does not fix this issue.