Merge "GUI -- augmented hash parsing to include flags (after '?'), which are passed into view callbacks as a boolean map.  - moved event test files into sub directories  - prepared topo2.js for scenario choice via hash context and 'local' (and 'debug') flag.  - added 'simple' scenario: 2 switches, 1 link, and 2 hosts.  - augmented topo event dispatch for yet-to-be-implemented event handlers.  - implemented addHost() event handler."