Separated linop.spy from chebDiscretization.spy. Further improvements needed to linop.spy.
Revert "Separated linop.spy from chebDiscretization.spy. Further improvements needed to linop.spy."

This reverts commit b28aa81f307c79f74693ecc42dc0a1abf9a62d01.
Revert "Revert "Separated linop.spy from chebDiscretization.spy. Further improvements needed to linop.spy.""

This reverts commit 43a67eb561c2ebf00b14a87813543df21e5d4be2.
Keep linop.spy from drawing dots, and go to no transparency.