Bugfix Reload button on new TAP_SCHEMA schemas, UCD dialog improvements, protected TAP_SCHEMA entities from removal, minor changes

Manage all without JPA; move some application logic into the datalayer (in order to rename it as TapSchemaManagerAPI); started management of multiple versions of TAP_SCHEMA added documentation

Refactoring: simplification of application architecture (removed dependencies to Jersey and AngularJS, managed all operations using JSF and JavaScript onevent functions)