Performance tweaks to Glyph3D.

Use batch copies where possible. This reduces the runtime on an
input with ~1M points by 6% (2.41 --> 2.27).

Change-Id: I6bc8de966724064bbb84e857ac35fb74088ef7b4
Merge topic 'glyph3d-batch-copies' into master

36fd8c7c Performance tweaks to Glyph3D.
Fix copy/paste typos in vtkBitArray::InsertTuples.

Change-Id: I5e92ca1fcc8922a610ece99e724a3bfb95e8a76b
Merge topic 'bitarray-warning-fix' into master

338266da Fix copy/paste typos in vtkBitArray::InsertTuples.