Makefile improvements for package managers
Merge branch 'master' of https://github.com/gbin/stats
Add --skip= option.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Update from ccan (want list_pop)

Upgraded ccan/list from CCAN 8216fa0be7d9bf39774a192d52fef955f6bd7cd8
Upgraded ccan/rbuf from CCAN 44b37ee8aeb185f6837378fef17d887bda6ff89b

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Run tests under valgrind, don't leak memory.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>