Adds Form files upload type

app/config/config_dev.yml

app/config/config_vendors.yml

app/config/parameters.yml.dist

src/Biopen/CoreBundle/Document/AbstractFile.php

src/Biopen/CoreBundle/EventListener/ImageResizer.php

src/Biopen/CoreBundle/Services/UploadDirectoryNamer.php

...n/GeoDirectoryBundle/Controller/ElementFormController.php

src/Biopen/GeoDirectoryBundle/Document/Element.php

...GeoDirectoryBundle/EventListener/ElementJsonGenerator.php

src/Biopen/GeoDirectoryBundle/Form/ElementFileType.php

src/Biopen/GeoDirectoryBundle/Form/ElementImageType.php

src/Biopen/GeoDirectoryBundle/Form/ElementType.php

...rectoryBundle/Resources/js/element-form/initialisation.js

...iopen/GeoDirectoryBundle/Resources/scss/element-form.scss

...ws/admin/core_custom/custom-fields/form-builder.html.twig

...undle/Resources/views/element-form/element-form.html.twig

...s/views/element-form/form-partials/files-images.html.twig

...sources/views/element-form/form-partials/images.html.twig

...ndle/Resources/views/element-form/form-renderer.html.twig