Move hooke.driver.igorbinarywave to hooke.util.igorbinarywave.

It's a utility for the MFP3D driver, not a driver in its own right.

diff --git a/hooke/driver/igorbinarywave.py b/hooke/util/igorbinarywave.py
similarity index 100%
rename from hooke/driver/igorbinarywave.py
rename to hooke/util/igorbinarywave.py