Add better support for dumping cgo char arrays.
Add better support for dumping cgo char arrays.

This commit adds support for dumping a few cgo types like hexdump -C as
requested in issue #11.  In particular, it now handles char [#], unsigned
char [#], and uint8_t [#].

davecgh/go-spew,kortschak/utter,dvln/go-spew,davecgh/go-spew,dvln/go-spew,FactomProject/go-spew,bparees/go-spew,bparees/go-spew,FactomProject/go-spew