Neon 1.2.0 and Neon-GTD 1.2.1 Released

This release completes some of the functionality began in v1.1.5, updates a number of development tools and dependencies, corrects various minor visualization issues, and includes a major refactoring of Neon-GTD. Additionally, the neon-gtd-dev-1.2.1.war includes sample OWF widgets created from the Neon-GTD visualizations for use at the DI2E Plugfest. See the release notes for more information.