ISIS-568: reverting to JDK 1.6 (just for backward compatibility for one more release, as requested by community).
ISIS-872: fix to launch files for SimpleApp.
ISIS-913: removing IsisViewerInstaller and EmbeddedWebServerInstaller APIs (and implementations)
ISIS-913: removing TemplateImageLoader, also DeploymentType.EXPLORATION, PROTOTYPE, CLIENT (have retained the server-side equivalents).

Also removed MultiUserExplorationSession.
ISIS-913: further stuff pertaining to removing the EmbeddedWebServer API.
ISIS-913: fixes for tests to pass.
ISIS-802: removing UserProfileStore, Perspective, Options.  Localization reverted to using the server default (since was only ever populated in Scimpi, and there are other JIRA issues already raised to implement client-side i18n).