JCLOUDS-54. remove historical demos, archetypes and assemblies modules
JCLOUDS-31. adjust license plugin and header file to ASF license scheme; change java to comment style; include maven pom.xml
JCLOUDS-31. remove malformed, duplicate, or unnecessary headers
JCLOUDS-31. manually adjusted license header on checkstyle files
JCLOUDS-31. updated to ASF headers via mvn com.mycila.maven-license-plugin:maven-license-plugin:format