I added an improved version. It has better topology so it deforms better, the armature is well fitted, there is a normalmap and a specular. For now it has a set of idle animations, I plan adding at least a walk. The new mesh is 5289 triangles.
The old version had a lower polygon count (3348 tris), a sitting, walking and idle animation and three diffuse textures. If someone is interested, I can add it back as a separate blend.