Householder reflectors

Collaboration diagram for Householder reflectors:

Modules
	larf: apply Householder reflector
	larfx: apply Householder reflector, unrolled
	larfy: apply Householder reflector symmetrically (2-sided)
	larfb: apply block Householder reflector
	larfg: generate Householder reflector
	larfgp: generate Householder reflector, beta ≥ 0
	larft: generate T matrix

Detailed Description