Updated closure compiler.

Author: mrdoob

package.json

@@ -13,7 +13,7 @@
   "scripts": {
     "build": "rollup -c",
     "build-uglify": "rollup -c && uglifyjs build/stats.js -cm --preamble \"// stats.js - http://github.com/mrdoob/stats.js\" > build/stats.min.js",
-    "build-closure": "rollup -c && java -jar utils/compiler/compiler.jar --language_in=ECMASCRIPT5_STRICT --js build/stats.js --js_output_file build/stats.min.js",
+    "build-closure": "rollup -c && java -jar utils/compiler/closure-compiler-v20160713.jar --language_in=ECMASCRIPT5_STRICT --js build/stats.js --js_output_file build/stats.min.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {

utils/builder.py

@@ -20,29 +20,41 @@ The [Closure Compiler](https://developers.google.com/closure/compiler/) is a too
 
 Note: The Closure Compiler requires [Java 7 or higher](http://www.java.com/).
 
-### Using [Ant](http://ant.apache.org/)
-
-1. Download the [Ant build tool](http://ant.apache.org/bindownload.cgi).
-
-2. At the root of the source tree, there is an Ant file named ```build.xml```.
-   To use it, navigate to the same directory and type the command
-
-    ```
-    ant jar
-    ```
-
-    This will produce a jar file called ```build/compiler.jar```.
+### Using [Maven](http://maven.apache.org/)
+
+1. Download [Maven](http://maven.apache.org/download.cgi).
+
+2. Add sonatype snapshots repository to `~/.m2/settings.xml`:
+   ```
+   <profile>
+     <id>allow-snapshots</id>
+        <activation><activeByDefault>true</activeByDefault></activation>
+     <repositories>
+       <repository>
+         <id>snapshots-repo</id>
+         <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+         <releases><enabled>false</enabled></releases>
+         <snapshots><enabled>true</enabled></snapshots>
+       </repository>
+     </repositories>
+   </profile>
+   ```
+
+3. Run `mvn -DskipTests` (omit the `-DskipTests` if you want to run all the
+unit tests too).
+
+    This will produce a jar file called `target/closure-compiler-1.0-SNAPSHOT.jar`.
 
 ### Using [Eclipse](http://www.eclipse.org/)
 
 1. Download and open the [Eclipse IDE](http://www.eclipse.org/).
-2. Navigate to ```File > New > Project ...``` and create a Java Project. Give
+2. Navigate to `File > New > Project ...` and create a Java Project. Give
    the project a name.
-3. Select ```Create project from existing source``` and choose the root of the
+3. Select `Create project from existing source` and choose the root of the
    checked-out source tree as the existing directory.
-3. Navigate to the ```build.xml``` file. You will see all the build rules in
-   the Outline pane. Run the ```jar``` rule to build the compiler in
-   ```build/compiler.jar```.
+3. Navigate to the `build.xml` file. You will see all the build rules in
+   the Outline pane. Run the `jar` rule to build the compiler in
+   `build/compiler.jar`.
 
 ## Running
 
@@ -91,7 +103,7 @@ You can also use minimatch-style globs.
 # Recursively include all js files in subdirs
 java -jar compiler.jar --js_output_file=out.js 'src/**.js'
 
-# Recursively include all js files in subdirs, exclusing test files.
+# Recursively include all js files in subdirs, excluding test files.
 # Use single-quotes, so that bash doesn't try to expand the '!'
 java -jar compiler.jar --js_output_file=out.js 'src/**.js' '!**_test.js'
 ```
@@ -118,10 +130,21 @@ will re-order the inputs automatically.
 1. Consult the [FAQ](https://github.com/google/closure-compiler/wiki/FAQ) to make sure that the behaviour you would like isn't specifically excluded (such as string inlining).
 2. Make sure someone hasn't requested the same thing. See the list of [known issues](https://github.com/google/closure-compiler/issues).
 3. Read up on [what type of feature requests are accepted](https://github.com/google/closure-compiler/wiki/FAQ#how-do-i-submit-a-feature-request-for-a-new-type-of-optimization).
-4. Submit your reqest as an issue.
+4. Submit your request as an issue.
 
 ### Submitting patches
-1. All contributors must sign a contributor license agreement. See the [CONTRIBUTORS](https://raw.githubusercontent.com/google/closure-compiler/master/CONTRIBUTORS) file for details.
+1. All contributors must sign a contributor license agreement (CLA).
+   A CLA basically says that you own the rights to any code you contribute,
+   and that you give us permission to use that code in Closure Compiler.
+   You maintain the copyright on that code.
+   If you own all the rights to your code, you can fill out an
+   [individual CLA](http://code.google.com/legal/individual-cla-v1.0.html).
+   If your employer has any rights to your code, then they also need to fill out
+   a [corporate CLA](http://code.google.com/legal/corporate-cla-v1.0.html).
+   If you don't know if your employer has any rights to your code, you should
+   ask before signing anything.
+   By default, anyone with an @google.com email address already has a CLA
+   signed for them.
 2. To make sure your changes are of the type that will be accepted, ask about your patch on the [Closure Compiler Discuss Group](https://groups.google.com/forum/#!forum/closure-compiler-discuss)
 3. Fork the repository.
 4. Make your changes.
@@ -234,7 +257,7 @@ options/arguments in your CUI application.</td>
 
   <tr>
     <td>Version</td>
-    <td>18.0</td>
+    <td>20.0</td>
   </tr>
 
   <tr>
@@ -331,7 +354,7 @@ options/arguments in your CUI application.</td>
 
   <tr>
     <td>URL</td>
-    <td>http://code.google.com/p/protobuf/</td>
+    <td>https://github.com/google/protobuf</td>
   </tr>
 
   <tr>
@@ -437,7 +460,7 @@ without make's wrinkles and with the full portability of pure java code.</td>
 
   <tr>
     <td>URL</td>
-    <td>https://code.google.com/p/google-gson/</td>
+    <td>https://github.com/google/gson</td>
   </tr>
 
   <tr>