Rewrite borodin_tree to use ksize.
More fixes.
Fixed key output.
Changed stress tests to use variable length keys.
New function brtr_append_s().
Changed all sizes to size_t.
Fixed call to brtr_append().
Change counts to forced counts in benchmarks.
Added some fscks to stress.
Added back alignments to pointer (in a different place).
Minor code cleaning.
New helping function p_key(), to print a key in brtr_fsck().
Do not call brtr_fsck() on arrays in stress.
Updated TODO.
Use a wrapper function to test values in stress.
Lowered TESTNUM from 1250000 to 1000000 to avoid stack overflows.
Updated TODO.