Import ammo.js as a git submodule and update README.md

.gitmodules

+[submodule "example/ammo.js/ammo.js"]
+	path = example/ammo.js/ammo.js
+	url = git://github.com/kripken/ammo.js.git

README.md

@@ -2,7 +2,7 @@
 
 WebAssembly に対する電子透かし埋め込み器
 
-## 開発環境
+## Environment
 
 Language: C++17
 
@@ -12,16 +12,14 @@ Compilers: GCC, Clang, emcc
 
 Libraries: Boost, Binaryen 1.38.30
 
-## 命名規約
-
-## プロジェクトのダウンロード
+## How to Clone
 
 ```shell
-$ git clone git@github.com:NagayamaRyoga/wasm-watermarker.git
+$ git clone --recursive git@github.com:NagayamaRyoga/wasm-watermarker.git
 $ cd wasm-watermarker
 ```
 
-## ビルド
+## How to Build
 
 ```shell
 $ mkdir build && cd build
@@ -29,31 +27,9 @@ $ cmake ..
 $ make
 ```
 
-## 実行方法
+## How to Run
 
 ```shell
 $ snpi <input-wasm> <watermark>
 $ pisn <input-wasm>
 ```
-
-## ライセンス表示
-
-### example/ammo.wasm.wasm
-
-Copyright (c) 2011 ammo.js contributors
-
-This software is provided 'as-is', without any express or implied
-warranty.  In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-1. The origin of this software must not be misrepresented; you must not
-   claim that you wrote the original software. If you use this software
-   in a product, an acknowledgment in the product documentation would be
-   appreciated but is not required.
-2. Altered source versions must be plainly marked as such, and must not be
-   misrepresented as being the original software.
-3. This notice may not be removed or altered from any source distribution.

ammo.js @ aab297a4

+Subproject commit aab297a4164779c3a9d8dc8d9da26958de3cb778

example/amount.zsh

@@ -5,7 +5,7 @@ path=("$PWD/../build/src" $path[@])
 wasms=(
     $PWD/styled-jsx/mappings.wasm
     $PWD/zlib-wasm/zlib-sample.wasm
-    $PWD/ammo/ammo.wasm.wasm
+    $PWD/ammo.js/ammo.js/builds/ammo.wasm.wasm
 )
 
 echo "name, size[B], funcs, opswap[bit], funcord[bit]"