Oh my Zombie Version 0.013

Hi gals and guys,

Oh My Zombie Version 0.013 is out now.
You can see the list of changes below:

Bugfixes:
- fixed player bouncing off the ground after double jump
- increased game stability by setting up a global class- and component-reference-system
- fixed camera not catching up with player when he jumps down from a high ground

General changes:
- changed player jumping behavior, added a bit more jumping power
- changed camera following: camera follows more smooth on the y-axis, also adapting the follow-speed according to the player speed.

Have fun with the new "Oh my Zombie"-demo-version and feel free to give me some feedback.
It is always appreciated.

Cheers,
Tobi Preacher