React Slider Versions Save

• introduces keyboard accessibility thanks to @B-Reif work in #113

• Fixed bug related to defaultValue

• add bower.json

Breaking changes:

• Now accepts onBeforeChange, onChange and onAfterChange instead of the slightly more confusing onChange and onChanged callbacks.

New features:

• invert property inverts the slider
• snapDragDisabled property disables the snap drag behavior.

Changes:

• Handles will no longer prevent touch-scrolling.
• Snap drag behaviour disabled for touch events (was interfering with the touch-scrolling as well).