Staging v3 changes

## 3.0.0
## **Breaking changes in this update! Pay attention!!**
* Fix for #170, #179, #183: Changed event to `dp.-` options load as
`data-date-OPTION` instead of `data-OPTION`. This should fix the double
change event firing.
* Fix for #192: `setDate` now fires `dp.change`
* Fix for #182: Picker will **not** set the default date if the input
field has a value
* Fix for #169: Seconds doesn't get reset when changing the date (Thanks
to PR #174)
* Fix for #168 z-index fix for BS modal
* Fix for #155 Picker properly displays the active year and month
* Fix for #154 CSS update to fix the collapse jump
* Fix for #150 and #75 `minViewMode` and `viewMode` work properly
* Fix for #44 Finally! It's here!! Thanks to @ruiwei and his code on
#210 picker will adjust the positioning of the widget.

#### **Manually merged PR**
* #178 When using `minuteStepping` the minute select grid will only show
available steppings
* #195, #197 Using the `data-OPTION` has been changed to
`data-date-OPTION`. These options are expected to be on the
`input-group` if you're using the `form-group` **or** the input field
* #184 The option `sideBySide` change be used to display both the d and
the timepicker side by side

#### **Other Changes**
* Changed picker width to 300px if using seconds and am/pm
* Added option `useCurrent`, thanks to @ruiwei. When true, picker will
set the value to the current date/time (respects picker's format)
* Added option `showToday`, thanks to @ruiwei. When true, picker will
display a small arrow to indicate today's date.
* Changed `startDate` to `minDate` and `endDate` to `maxDate` to make it
more clear what these options do.