Add sloppy_quorum and n_val options
Fix type error; Dialyzer output doesn't change, odd
Fix cut-and-paste error in n_val option type comment
Address Joe's review comments
Limit tombstone reaping when delete + client n_val is specified
EUnit test fix
Add Joe's check for n_val on get to avoid reaping
Merge branch 'slf-sloppy_quorum+n_val' to master