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.
Toplevel Stream compatible to substreams
Stream transcoders for
	zlib deflate
	tiff
	CCITT Fax
	[can also be abused for ZIP, i.e. epub] (use internal zip support?)
		not really since this here has not support for multifile things.
		ZipArchive
			this(void[] buffer); in order to read existing zip file.
			uint numEntries()
			ArchiveMember[string] directory(); 
ZipArchive archive = new ZipArchive(data);
foreach (ArchiveMember am; archive.directory)
{
    writefln("member name is '%s'", am.name);
}
ubyte[] expand(ArchiveMember de); 
 Fills in properties extractVersion, flags, compressionMethod, time, crc32,
compressedSize, expandedSize, expandedData[], name[], extra[].