Merge pull request #24 from kirkerafael/master

Merge pull request #23 from notFloran/php-7.0

Remove PHP 7.0 and require at least 7.1

Merge pull request #21 from notFloran/typehint-and-php-73-deprecations

Add typehint and remove deprecation of FILTER_FLAG_SCHEME_REQUIRED in PHP 7.3

Merge pull request #19 from n3o77/master

check if image file exists

Merge pull request #18 from ter-informatique/basepath-and-url

Dont append base path to complete URLs

Merge pull request #13 from n3o77/master

Allow to set base path for the image lookup

fix php 7 build