graph: updated to work with sqlite3, issue #369

the original node-sqlite plugin is deprecated and doesn't build.
resolves issue #369
added graph.ini, consolidate graph settings into .ini

removing the need to edit graph.js to alter the DB file/path, or listening IP

will use old .ini files if newer config.ini not present, and retains defaults
graph: added a missing + in the log message
Merge pull request #398 from msimerson/graph

graph: updated to work with sqlite3, issue #369