Allow the class to be extended
Merge pull request #11 from garoevans/patch-1

Allow the class to be extended
Add php tag to config file

From my tests you need to add the opening php tag in order to work with the php config format. Just a minor nitpick. ;-)
Merge pull request #12 from mre/patch-1

Add php tag to config file
Add XML file support.
Merge pull request #14 from DavidePastore/add-xml-support

Add XML file support.
minor README update
added composer.lock to gitignore
fixes #10