Allow depthTest and depthWrite in line material

[vorg]

Currently they are hardcoded

getPipelineOptions() {
   return { depthWrite: true, depthTest: true };
},

//should be 

getPipelineOptions(entity) {
    return {
      depthWrite: !!entity.material.depthWrite,
      depthTest: !!entity.material.depthTest
   };
 },

allowing you for example debug mesh skeleton