Choose FlexSlider style via CMS

[jsirish]

Allow users to choose a style for FlexSlider. Select and implement the most useful examples from Flexslider Live Demo:

http://flexslider.woothemes.com

The 'slider w/ thumbnail slider' would be useful for a photo gallery:

http://flexslider.woothemes.com/thumbnail-slider.html

[muskie9]

We can definitely integrate this in. @korthjp17 we'll need to update the FlexSlider.ss include to check for the option once it's added in and the init for it will need to go into the onAfterInit() in FlexSliderExtension.php.

I may look into trying to utilize $this->extend() in Page_Controller to see if we can avoid the onAfterInit() as it's made some issues in the past.

We'll need to do quite a bit of usability testing with this as the more options we add the more points of failure there could be with the UI.

[korthjp17]

This is the chunk we we need that adds the init
https://gitlab.com/dynamic-inc-sites/kohler-global-projects/blob/master/mysite/code/pages/Reference.php#L500

this is the chunk in the include:
https://gitlab.com/dynamic-inc-sites/kohler-global-projects/blob/master/themes/kcaw/templates/Includes/FlexSliderThumb.ss#L16