minor hygiene

• marginally improved UI and API updates
• important bugfix to BaseClient generic types
• pin Maven Jetty version

match deployed Maven release versions

• bugfixes to UUID generation & serialization
• minor improvements to time / interval logic

DeCaro UI

Improved facilitator and client UIs with Daniel DeCaro

• update default header and body CSS for HTMLEditorKit's limited CSS support
• add cumulative round number to ExperimentConfiguration (1,2,3,4,..,N) where N is the number of rounds via ExperimentConfiguration.getCurrentRoundNumber()
• add summarized boolean to ShowInstructionsRequest. When true, summarized instructions will be shown instead of full instructions
• add UUID to Identifier

fixes repeating rounds and persistence issues

• add preliminary docker-compose ization
• fix binary savefiles not being stored properly for repeating rounds
• add slightly improved ExperimentConfiguration.iterator() support to iterate through all ExperimentRoundParameters including repeated rounds
• add tests and jacoco code coverage

repeating rounds

Provides support for repeating rounds via the repeat parameter in a round configuration file e.g., round2.xml.

repeat=N means the round will run exactly N times. Degenerate values, N <= 1, result in the given round executing only a single time.