bbb-lti: Added datatables to tool view

...grails-app/assets/javascripts/dataTables.bootstrap.min.js

bbb-lti/grails-app/assets/javascripts/jquery-1.12.3.min.js

...ti/grails-app/assets/javascripts/jquery.dataTables.min.js

bbb-lti/grails-app/assets/javascripts/tool.js

...rails-app/assets/stylesheets/dataTables.bootstrap.min.css

...grails-app/assets/stylesheets/dataTables.jqueryui.min.css

bbb-lti/grails-app/assets/stylesheets/jquery.dataTables.css

bbb-lti/grails-app/assets/stylesheets/tool.css

bbb-lti/grails-app/views/tool/index.gsp