Added parameters to dateInput and dateRangeInput (#1373)

[octaviancorlade]

Exposing parameters for the dateInput and dateRangeInput from the Bootstrap Datepicker:
- autoclose
- multidate
- multidateSeparator
- orientation
- title
- todayBtn
- todayHighlight
- toggleActive
- calendarWeeks
- clearBtn
- datesDisabled
- daysOfWeekDisabled
- daysOfWeekHighlighted
- immediateUpdates
- keyboardNavigation

[wch]

Just a quick note: the Shiny team has been debating how best to expose these options. It's something that we don't have an answer for yet, but it is certainly on our radar.

[JanaZraik]

anybody can help me in using rows as an input in shiny? also maintaining the 1st row and first col as fixed (non choosable)

[peeyooshc]

Loving all the updates and features to date. Any update on adding these features in? Would be really useful.

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