- Introduced user registration

- Now using Spring Boot for classloading, this way local development does not need to restart the complete server
- Fixed all kinds of dependencies on the names of the lessons necessary to keep in mind during the creation of a lesson.
- Simplied loading of resources, by adding resource mappings in MvcConfig.
- Refactored plugin loading, now only one class is left for loading the lessons.

webgoat-lessons/cross-site-scripting/src/main/resources/html/CrossSiteScripting.html

@@ -64,7 +64,7 @@
 		<!-- include content here, or can be placed in another location. Content will be presented via asciidocs files,
 		which you put in src/main/resources/plugin/lessonplans/{lang}/{fileName}.adoc -->
 		<div class="adoc-content" th:replace="doc:CrossSiteScripting_content5.adoc"></div>
-		<img align="middle" th:src="@{/plugin_lessons/plugin/CrossSiteScripting/images/Reflected-XSS.png}" />
+		<img align="middle" th:src="@{/images/Reflected-XSS.png}" />
 	</div>
 	<div class="lesson-page-wrapper">
 		<!-- reuse this lesson-page-wrapper block for each 'page' of content in your lesson -->