Improve date picker story

[davidnixon]

Add stories to illustrate how to the the flatpickr options
The date picker derives from flatpickr so any of the options there can be added to the component via the calOptions param.

Tasks

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1. Add story illustrating the max/min date
2. Add a second story related to calOptions. Any of showMonths, monthSelectorType, or hourIncrement (time picker) would be great.
3. Add to docs area of data picker and time picker a link to the flatpickr options. Include a hint of what options may not be applicable. For example, I'm not sure if the events like onReady work with Carbon. Maybe position and prevArrow work? Not sure.