Adds image upload in public form

app/config/config_vendors.yml

src/Biopen/CoreBundle/Document/AbstractFile.php

src/Biopen/CoreBundle/Document/EmbeddedImage.php

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

src/Biopen/GeoDirectoryBundle/Document/Element.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

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

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

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