Add cookie option to win_get_url

Add cookie option for win_get_url.  This is useful to download files that require license agreements such as java.

Example:
```
   - name: Get Java SDK
      win_get_url:
        url: "http://download.oracle.com/otn-pub/java/jdk/7u67-b01/jdk-7u67-windows-x64.exe"
        dest: "C:/jdk-7u67-windows-x64.exe"
        cookie: "oraclelicense=accept-securebackup-cookie"
```