Update files that depend on storage functions to include storage.h
Declare as static all functions in storage.c that are not needed externally.
Add dependencies to makefile-tail.
modified: makefile-tail
new file: ../inc/storage.h
modified: ../src/allocmds.c
modified: ../src/gchtfind.c
modified: ../src/llstk.c
modified: ../src/main.c
modified: ../src/storage.c
modified: ../src/subr.c
