reliability model: recognize stripe widths and binary sizes
	add support for RADOS object stripe with parameters
	add support for K=1024 (files) as well as 1000 (disk & b/w)

Signed-off-by: markkampe <mark.kampe@inktank.com>
reliability model: major enhancements
	!!! shift from per PB durability to per object durability (huge)
	estimate durability impact of pre-replication failures (small)
	estimate durability impact of striping (huge)
	refactor per PB losses into per-object methods
	refactor all probability multiplications to FIT rate multipliers
	more consistent conventions on identifying modeled unit of failure

Signed-off-by: markkampe <mark.kampe@inktank.com>