Update flexslider.css
Adding timeout event to ensure animation wrap-up when transitionEnd event failed to fire.
Adding option not to fade first slide with 'fadeFirstSlide' option
Created flexslider.less with mixins.
Adds CONTRIBUTING.md and updates the README.mdown file to include a note about contributing and how release work.
Links to the development roadmap inside the README.mdown file.
Renames the README title to 2.3.0-bleeding and adds a Gitter badge.
Merge pull request #1099 from jsit/fadefirstslide

Adds option not to fade first slide with 'fadeFirstSlide' option. Closes #848.
Merge pull request #1106 from villeristi/master

Adds a base flexslider.less file with mixins.
Merge pull request #1048 from nibushibu/patch-1

Adds line-height setting for flex-direction-nav in the CSS file.
Registered keyup as an eventType

For play/pause button keyboard accessibility
Merge pull request #1126 from altruity/master

Registers keyup as an eventType.
Bug in less file
Merge pull request #1135 from sdebacker/patch-1

Bug in less file
Merged with upstream