Adds support for allowOneSlide option that will still initialize a flexslider even if only one slide exists
Updates README to cover allowOneSlide option
Don't initialize if 0 items
Applies logic from #627.
Adds default setting and logic to allow a single slide to display in a slideshow.
Merge branch 'patbenatar-feature/allow-one-slide' into clean-develop
Merge branch 'develop' of https://github.com/woothemes/FlexSlider into clean-develop
Fixes slider.play() leaving unstoppable setIntervals. Merges #714.
Merge branch 'develop' of https://github.com/woothemes/FlexSlider into clean-develop