Import ccan/

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
configure is now a script.

Using CCAN's configurator for now.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Improved readme with instructions for Xubuntu 13.04 and Wheezy variants.

Conflicts:
	README
	test/Makefile
Add Travis support for testing on github.

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