Fix the name and the readme

README.md

-# Tahoe-CHK
+# GBS-Downloader
 
 ## What is it?
 
-Tahoe-CHK is a Haskell implementation of the [Tahoe-LAFS](https://tahoe-lafs.org/) CHK crytographic protocol.
+GBS-Downloader integrates Tahoe-CHK with Tahoe-Great-Black-Swamp to support downloading and decoding data from Great Black Swamp servers.
 It aims for bit-for-bit compatibility with the original Python implementation.
 
-It will not include an implementation of any network protocol for transferring CHK shares.
-However, its APIs are intended to be easy to integrate with such an implementation.
-
 ### What is the current state?
 
-* Convergent encryption is supported and compatible with Tahoe-LAFS.
-* CHK encoding is implemented but some cases are unsupported:
-  * It is not allowed that k == 1 or k == n.
-* CHK decoding is implemented with the same limitations as for encoding.
-  * Authenticity of the decoded data is not yet verified.
+It's just starting.
+It can't do much.
 
 ## Why does it exist?
 

flake.nix

 {
-  description = "tahoe-downloader";
+  description = "gbs-downloader";
 
   inputs = {
     # Nix Inputs
@@ -26,7 +26,7 @@
         inherit pkgs;
         src = ./.;
         compilerVersion = ghcVersion;
-        packageName = "tahoe-downloader";
+        packageName = "gbs-downloader";
       };
     in {
       checks = hslib.checks {};
@@ -46,7 +46,7 @@
             text = ''
               cabal update hackage.haskell.org
               cabal build --enable-tests
-              eval "$(cabal list-bin tahoe-chk-tests)"
+              eval "$(cabal list-bin gbs-downloader-tests)"
             '';
           }
         }/bin/cabal-build-and-test";