Upgraded to Java 8 and Wildfly 8.1

Using lambdas removes the need for Guava
Tests and deployment now target Wildfly 8.1
Using the latest BOMs to keep the maven dependencies simpler
Migrated the Front-end code to AngularJS 1.2.22 and removed some unused files
Migrated the CDI deployment descriptor (beans.xml) to version 1.1

Added a LICENSE.txt and a (real) README.adoc