added webpack-encore for managing frontend assets #113 (#122)

* updated installation docu #113
* rewritten login page #113
* added icheck plugin #113
* changed to YesNoType in edit forms #113
* updated CONTRIBUTING.md #113
* added start of developer docu #113
* added compile scripts and compiled assets #113

templates/admin/project.html.twig

@@ -4,7 +4,6 @@
 
 {% block page_title %}{{ 'admin_project.title'|trans }}{% endblock %}
 {% block page_subtitle %}{{ 'admin_project.subtitle'|trans }} {{ 'subtitle.amount'|trans({'%count%': entries.count}) }}{% endblock %}
-{% block javascript_imports %}<script src="{{ asset('js/toolbar.js') }}"></script>{% endblock %}
 
 {% block main %}
     {% if entries.count == 0 %}