Add option to alternatively run against a remote SPARQL endpoint.

Added another tool: runs SPARQL updates in place on a file.

Make 'sparql' command work again by importing jena-cmds. Invert expectations of ASK queries.

Pretty print XML results. Add flag for ignoring failures/errors. Change errors to failures.

Update deps, move to Jena 3.x, Java >=8, sbt 1.x. Move to floop.org.uk. Try again to put all graphs, named or otherwise, into one graph for querying.