ini_file: add support for lists of options/values

This patch adds support for setting/removing a bunch of options/values from an .INI file. A example play would be:

```yaml
  - action: ini_file
                dest=/tmp/d.ini
                section='demosec'
                option=command,directory,user
                value="ls -l","/etc/someplace","JPM"
                state=present
```

which, with one invocation (instead of three!) creates the following INI file

```ini

[demosec]
command = ls -l
directory = /etc/someplace
user = JPM
```