Sparql modifications

Using V7 build (IP address for V7 VMWare)
Fixed bug in ML Config for Roxy
Fixed JSON response parsing for 20x and 30x responses in xhr2
Updated sample main page to add sample triples
Updated core and sparqlbar widget to support semanticcontext and
optional linked searchcontext
Moved tripleconfig to mljs core
Updated sample sparqlbar page
Updated planning doc based on V7 train the trainer