Support for composer

[jacobalberty]

This patch adds a composer.json that can be used to add nanodicom to packagist.org later on.

[emmetog]

Ping :slightly_smiling_face: It would be great to get this merged

[ghost]

Seems that this library is not actively developed.

[lopezdonaque]

You could use this code into your composer.json.

  "repositories":
  [
    {
      "type": "package",
      "package":
      {
        "name": "nanodocumet/nanodicom",
        "version": "master",
        "source":
        {
          "type": "git",
          "url": "https://github.com/nanodocumet/Nanodicom.git",
          "reference": "master"
        }
      }
    }
  ],
  "autoload":
  {   
    "classmap":
    [   
      "vendor/nanodocumet/nanodicom"
    ]
  },
  "require":
  {
    "nanodocumet/nanodicom": "dev-master"
  }