add some UNPACKs to improve performance a bit
drwxr-xr-x - Control
-rw-r--r-- 1611 LICENSE
-rw-r--r-- 87 Setup.hs
-rw-r--r-- 77 prologue.txt
-rw-r--r-- 827 stm.cabal
drwxr-xr-x - tests