Added smoketest for datasets

Author: erikwijmans

tests/test_dataloaders.py

@@ -0,0 +1,9 @@
+from pointnet2 import data
+
+def test_modelnet40():
+    dset = data.ModelNet40Cls(1024)
+    dset[0]
+
+def test_semseg():
+    dset = data.Indoor3DSemSeg(1024)
+    dset[0]