update openmesh calls in README.md

README.md

@@ -21,8 +21,7 @@ a Python library for visualizing meshes, point clouds, and other geometry in Jup
 import threevis
 import openmesh as om
 
-m = om.TriMesh()
-om.read_mesh(m, '/home/dseyb/git/openmesh-python/tests/TestFiles/cube-minimal-normals.ply')
+m = om.read_trimesh('examples/models/bunny.obj')
 
 threevis.display_openmesh(m)
 ```
@@ -35,8 +34,7 @@ import openmesh as om
 import numpy as np
 
 # Load Mesh
-m = om.TriMesh()
-om.read_mesh(m, "./mouse.obj")
+m = om.read_trimesh('mouse.obj')
 
 # Create Context
 ctx = threevis.Context(width=640, height=480)