National charsets support

[Nikolay via Digitalmars-d-announce]

I am quite happy with UTF support in phobos, but support for 
national codepages is very limited in phobos. Also it is not 
conform with ranges. So I decide share my project for supporting 
national charsets: 
https://bitbucket.org/sibnick/national-encoding.git

Sample code:

         import national.charsets, std.array;
	dstring s = "123Я";
	auto cp1251 = Windows1251.encode(s).array;
	auto utf32 = Windows1251.decode(cp1251).array;

	ubyte[] cp866 = CHARSETS["cp866"].encode(s).array;
	utf32 = CHARSETS["cp866"].decode(cp866).array;


Every codec accepts range of some chars and returns range of 
ubytes. Every decoder accepts range of ubytes  and returns range 
of dchars. This library is not cover UTF codecs, and multibytes 
national code pages.