Inlined some method calls in me.TMXOrthogonalRenderer.drawTileLayer

A couple of method calls in drawTileLayer were creating garbage unnecessarily, i.e. `me.Vector2d` objects which were immediately released.  Inlining these methods gives us slightly less elegant code but saves us some cycles on garbage collection.  
Are you sure you are pushing these vectors (pixelToTile and tileToPixel) back into the pool when you are done with them? I did a quick page-search for these method names and did not find any references that would suggest that is taken care of. This will cause a "memory leak" if it is not handled properly.

Second, if these methods may ever be called by user code (in this case they are ignored by documentation) then this behavior would need to be well-documented. Or better, avoided altogether.