Add attackable.js module.

Signed-off-by: Atom Macumber <amacumber@eagleproductivity.com>
Return Attackable function from module.

Signed-off-by: Atom Macumber <amacumber@eagleproductivity.com>
Convert actor.js to requireJS/module pattern.

Signed-off-by: Atom Macumber <amacumber@eagleproductivity.com>
Add character.js.

Signed-off-by: Atom Macumber <amacumber@eagleproductivity.com>