Added an argument to specify the templates path for the formatter

[zepich]

I needed the ability to add some small changes to the templates. To be able to do that i've added a new argument to the constructor of the Formatter class. With this argument you can specify a custom template directory where you can store your modified templates.

Feel free to merge it into the library if you want.

Example code:

<?php
$a = [
    'city' => 'Testtown',
    'country' => 'United States of America',
    'country_code' => 'US',
    'house_number' => '123',
    'road' => 'Test Road',
    'postcode' => '08000-6000',
    'state' => 'New Jersey'
];
$formatter = new Formatter(__DIR__ . '/templates/conf');
$text = $formatter->formatArray($a, ['country' => 'US']);`

[coveralls]

Coverage increased (+0.01%) to 95.308% when pulling f2123f0 on zepich:master into c4b4a61 on predicthq:master.