Trying to fix `FlxPreloader`... again...
Changed `minDisplayTime` back to something small...
`FlxPreloader` changed `minDisplayTime` to `1`
Update FlxPreloader.hx

Comments!
Changed `realLoad` to `finish`
Tweaking `FlxPreloader` and removing now-unessecary Debug logic.
Fixing `FlxPreloader` so that it is 'skipped' when doing HTML5.
Improved how FlxSprites can be made flippable
Replaced "flippedWidth > 0" with "flippable"
Removed flippedWidth
FlxTween: add default values for duration
FlxPoint: added subtract() and subtractPoint()
FlxSprite: improved comments regarding facing / flippable
FlxTween: avoid potential issues with pooled tweens, closes #951

- made _finish() private and added a public finish() that only works with usePooling == false
- made setDelays(), init(), put() and update() private
- removed ease param from the tween() / setMotion() functions
- init() now only takes a TweenOptions object
FlxGradient: fix memory issues with the overlayGradientOn() functions, closes #928
.travis.yml: also compile for neko
FlxCamera: made drawFX() private
Update CHANGELOG.md
Update CHANGELOG.md
Update haxelib.json
Small improvements to FlxGamepadManager docs