Add support for installing via composer

Author: pjeby

README.md

@@ -56,7 +56,12 @@ print("hello world!")
 
 ## Installation
 
-If you have [basher](https://github.com/basherpm/basher), you can install `mdsh` by running `basher install bashup/mdsh`.  Otherwise just clone this repo and copy or link the `mdsh` file to a directory on your `PATH`.  (Or just [download the script directly](https://github.com/bashup/mdsh/raw/master/bin/mdsh) to a directory on your `PATH`.)
+`mdsh` can be installed in any of the following ways:
+
+* Using [basher](https://github.com/basherpm/basher), via `basher install bashup/mdsh`
+* Using [composer](https://getcomposer.org/), via `composer require bashup/mdsh:dev-master` (to add it to your project) or `composer global require bashup/mdsh:dev-master` (to install it globally)
+* Using git, by cloning this repo and copying or linking the `bin/mdsh` file to a directory on your `PATH`, or
+* Just [downloading the script directly](https://github.com/bashup/mdsh/raw/master/bin/mdsh) to a directory on your `PATH`, then running `chmod +x` on it)
 
 ## Usage
 

composer.json

@@ -0,0 +1,27 @@
+{
+    "name": "bashup/mdsh",
+    "license": "MIT",
+    "description": "Multi-lingual, Markdown-based Literate Shell Programming",
+    "homepage": "https://github.com/bashup/mdsh/",
+    "authors": [
+        {
+            "name": "PJ Eby",
+            "homepage": "https://github.com/pjeby"
+        }
+    ],
+    "keywords": [
+        "markdown",
+        "bash",
+        "shell-scripting",
+        "literate-programming"
+    ],
+    "support": {
+        "issues": "https://github.com/bashup/mdsh/issues"
+    },
+    "scripts": {
+        "test": "script/test"
+    },
+    "bin": [
+        "bin/mdsh"
+    ]
+}