Minor aesthetic change to boro_set_left() and boro_set_right().
Added ref/unref to boro_merge().
Added a test for boro_k_delete().
Added more verbose dumping in stress.
Updated TODO.
Allow an optional key in 'tree' in borotool.
Do not dump the 'list' and 'dict' trees in stress.
First try to fix boro_set_left_p() and boro_set_right_p().
Fixed boro_set_left_p() and boro_set_right_p() (Closes: #1046).
Minor optimization in set_l() and set_r().
New function ref_unref_p() to ref/unref without locking.