Update license info on all webp-shim sources. Provide an example in the top-level README file for bitjs

build/webp-shim/Dockerfile

@@ -6,9 +6,6 @@ RUN apt-get update && apt-get install -y \
     python \
     wget
 
-# Put more deps here ...
-# RUN apt-get update && apt-get install -y \
-
 RUN git clone https://github.com/webmproject/libwebp
 
 RUN git clone https://github.com/emscripten-core/emsdk.git && \
@@ -18,7 +15,7 @@ RUN git clone https://github.com/emscripten-core/emsdk.git && \
 
 RUN git clone https://github.com/nothings/stb.git
 
-# Figure out how to invoke emsdk/emsdk_env.sh and have it affect PATH.
+# TODO: Figure out how to invoke emsdk/emsdk_env.sh and have it affect PATH.
 ENV PATH="$PATH:/emsdk:/emsdk/node/12.9.1_64bit/bin:/emsdk/upstream/emscripten"
 
 COPY . .

build/webp-shim/src/webp.c

@@ -1,3 +1,14 @@
+/**
+ * webp.c
+ *
+ * Provides functionality for decoding a WebP imgae and converting it into
+ * alternative raster graphics formats (PNG/JPG).
+ *
+ * Licensed under the MIT License
+ *
+ * Copyright(c) 2020 Google Inc.
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include "emscripten.h"

build/webp-shim/test/harness.js

@@ -1,3 +1,12 @@
+/**
+ * harness.js
+ *
+ * Example of how to use the webp-shim functions.
+ *
+ * Licensed under the MIT License
+ *
+ * Copyright(c) 2020 Google Inc.
+ */
 import {convertWebPtoPNG, convertWebPtoJPG} from '../../../image/webp-shim/webp-shim.js';
 
 new Promise((resolve, reject) => {