working on more caching
handle seas in show-spec
more logging
make concurrency a switch that can be turned on/off
move concurrency stuff to top for readability
create local wrappers for rand-int and concurrency
parameterize random-order
fix rand-order -> actual ordering mapping
converting 4 ordered components of lightning-bolt to deferred execution
defer parents-with-phrasal-head
cleanup: remove unused stuff
make parents-with-lexical-heads a (fn)
defer two more variables

-parents-with-phrasal-heads-for-comp-phrases
-lexical-headed-phrases
lazy-shuffle parents-at-this-depth
add sleep2 (less specific than sleep1)
enable random-order and less verbose debug logging
exclude forest's deref, future, and rand-int
reenable concurrency and less verbose debugging
less logging of forest: DEBUG->INFO