Clean up FullPivHouseholderQR
Submitted by Benoit Jacob
Assigned to Benoit Jacob
Link to original bugzilla bug (#59)
Description
Make its API fully consistent with ColPivHouseholderQR. Make sure it doesn't do stupid things with thresholds.
It's OK to not have householderQ() and keep matrixQ() instead: having a householderQ() would be quite tricky. This decomposition is slow anyway.