At last, we have a player.

Consists of a simple standi animation currently being looped.

Compatible with any MineCraft skin, no texture included on GIT for licensing reasons.

Walk animations for the player (forward, backward, strafe left and strafe right). This commit removes other test cases from the default script, so that player.lua can be brought to what it's intended for

Punch / mine animation, and some consistency improvements to the player script