see also
	https://github.com/Dav1dde/nbd/blob/master/nbt.d
lexer
	multifile lexer!!! It is possible for the file to stop in the middle of the road and continue in the next file.
	lookahead 1 char.
	LL parsing
	HL parsing
	http://hackerpilot.github.io/experimental/std_lexer/phobos/lexer.html
	std.stdio: wrapFile(FILE* ), FILE* getFP(); auto chunks(File f, size_t size);
	a ~ b to concatenate ranges!
Toplevel Stream compatible to substreams
Stream transcoders for
	zlib
	tiff
	CCITT Fax
	[can also be abused for ZIP, i.e. epub]
special streams:
	pdf content stream
factor Name out into its own library.