Merge branch 'gfz3_laser' into 'master'

GFZ3 Unfuckening

Some tweaks to the GFZ3 Eggmobile's behaviour to make it less frustrating for old and new players alike.

* GFZ3 Eggmobile's laser won't change its angle when you move left and right anymore.
    * Changed because its ability to move quickly was extremely punishing for new players (see ProJared's youtube video on the matter).
    * http://gfycat.com/PassionateUnknownAgama (the twitching on the third laser has been fixed since this was recorded)
* GFZ3 Eggmobile will, when too far away from the ground and moving upwards, slow itself down vertically.
    * This was punishing and annoying for both old and new players alike.
    * http://gfycat.com/CornyLeftDungbeetle (old values - the typical settling height is slightly lower now)

See merge request !42