Moved key splitting to its own function.
Preliminary version of set_by_path() (untested).
New function boro_cmd_set().
More work in set_by_path() and related functions.
boro_reduce_store() and boro_reduce_json() also propagate the chain.
New function boro_mr_crc32().
Use boro_mr_crc32() in some stress tests.
Added more CRC32 to tests.
Call the chain at the beginning instead of the end in crc32.
Temporary crc value was not being propagated to strees.
Reworked boro_mr_crc32() to use a new boro_mr to iterate the strees.