Make tokenizer throw error on empty char literal, along with some slight cleanups in ccan_tokenizer.h

	http://www.funsitelots.com/ccan/ccan_tokenizer-20090703.tar.bz2

Important change:  array_pop no longer checks if the array has elements; use array_pop_check in its place.

I have given my array module a makeover (see attached
array-0.1.tar.bz2 ).  Major changes are:

* All the macros have been renamed to flat array_* names.  Instead of
Array, AInit, AAppend, etc., it is now array, array_init,
array_append, etc..  This will obviously break any applications
already using the array module (if any); 'renames' is the list of sed
commands I used to make the name changes.
* array (by default) now uses talloc functions instead of regular
malloc/realloc/free.
* All of the array macros have tests now.

Allow versions on dependencies.
Display external dependencies on info pages.

Also, add external depends to ogg_to_pcm.

- Deleted test/ dir, since it was a noop.