Blender Git Loki

BGE: Change character jumping to char

* Change the character jumping variables and methods from int to char.
* Limit the maxJumps integer value from 0 to 255.
* Allow to set the minimum jump amount to 0.

Reviewers: panzergame, lordloki, moguri

Reviewed By: lordloki, moguri

Subscribers: agoose77

Projects: #game_engine

Differential Revision: https://developer.blender.org/D1305