change the names of some variables and types for consistency across API's
drwxr-xr-x - include
-rw-r--r-- 1905 license.txt
-rw-r--r-- 3136 makefile
drwxr-xr-x - runtime
drwxr-xr-x - struct
drwxr-xr-x - test
-rw-r--r-- 445 todo
drwxr-xr-x - txn