Fix broken link in README.md
Fixes #15
diff --git a/README.md b/README.md
index d52b469..4912866 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@
## What Does Wuffs Code Look Like?
-The [`std/gif/decode_lzw.wuffs`](./std/gif/decode_lzw.wuffs) file is a good
+The [`std/lzw/decode_lzw.wuffs`](./std/lzw/decode_lzw.wuffs) file is a good
example. See the "Poking Around" section below for more guidance.
@@ -47,10 +47,10 @@
(transpile) the Wuffs code to C code:
```diff
-diff --git a/std/gif/decode_lzw.wuffs b/std/gif/decode_lzw.wuffs
+diff --git a/std/lzw/decode_lzw.wuffs b/std/lzw/decode_lzw.wuffs
index f878c5e..f10dcee 100644
---- a/std/gif/decode_lzw.wuffs
-+++ b/std/gif/decode_lzw.wuffs
+--- a/std/lzw/decode_lzw.wuffs
++++ b/std/lzw/decode_lzw.wuffs
@@ -98,7 +98,7 @@ pub func lzw_decoder.decode?(dst ptr buf1, src ptr buf1, src_final bool)() {
in.dst.write?(x:s)
@@ -64,7 +64,7 @@
```
$ wuffs gen std/gif
check: expression "(c + 1) as u8" bounds [1..256] is not within bounds [0..255] at
-/home/n/go/src/github.com/google/wuffs/std/gif/decode_lzw.wuffs:101. Facts:
+/home/n/go/src/github.com/google/wuffs/std/lzw/decode_lzw.wuffs:101. Facts:
n_bits < 8
c < 256
this.stack[s] == (c as u8)
@@ -75,10 +75,10 @@
correctly" tests then fail):
```diff
-diff --git a/std/gif/decode_lzw.wuffs b/std/gif/decode_lzw.wuffs
+diff --git a/std/lzw/decode_lzw.wuffs b/std/lzw/decode_lzw.wuffs
index f878c5e..b43443d 100644
---- a/std/gif/decode_lzw.wuffs
-+++ b/std/gif/decode_lzw.wuffs
+--- a/std/lzw/decode_lzw.wuffs
++++ b/std/lzw/decode_lzw.wuffs
@@ -97,8 +97,8 @@ pub func lzw_decoder.decode?(dst ptr buf1, src ptr buf1, src_final bool)() {
// type checking, bounds checking and code generation for it).
in.dst.write?(x:s)
@@ -233,7 +233,7 @@
## Poking Around
-Feel free to edit the `std/gif/decode_lzw.wuffs` file, which implements the GIF
+Feel free to edit the `std/lzw/decode_lzw.wuffs` file, which implements the GIF
LZW decoder. After editing, run `wuffs gen std/gif` or `wuffs test std/gif` to
re-generate the C edition of the Wuffs standard library's GIF codec, and
optionally run its tests.
@@ -354,4 +354,4 @@
---
-Updated on November 2017.
+Updated on June 2018.