move std.{ascii, base64, utf} to a new encoding package

[Seb via Digitalmars-d]

On Tuesday, 9 August 2016 at 00:24:40 UTC, Jonathan M Davis wrote:
> On Monday, August 08, 2016 19:42:50 Seb via Digitalmars-d wrote:
>> [...]
>
> std.encoding needs a complete overhaul. Unfortunately, while I 
> think that that's generally agreed upon, no one has stepped up 
> to do it. So, who knows when it'll be fixed. However, given 
> that std.encoding needs an overhaul, I don't seem much point in 
> moving stuff into it. While it may not be ideal, base64 works 
> where it is, and we can worry about moving it when std.encoding 
> is revamped. If we changed it now and then changed it again 
> when std.encoding got overhauled, then we'd end up breaking 
> code twice just to move a function around.
>
> - Jonathan M Davis

Thanks @ all for your explanations!
FWIW I have added std.encoding to the wiki's wishlist ;-)

https://wiki.dlang.org/Wish_list#std.encoding