added options page; save & restore; options for conf options -- not yet hooked up to graph
made options easier to extend
removed dependency defaults.js->widgets.js so that historygraph.js doesnt't have to load the widgets
added a restore-defaults button; made the restore_options function have a better less magical use
added the filter_singletons feature; had to convert graph representation since the node indices change ... easier way to do this?
renamed graph.nodes and graph.links to graph.n and graph.e to distinguish properties from global vars; fixed a bug which deleted node.array_index too early for some nodes
tweaked max & step values
okay, nodesize max does not need to be that big, and its step should definitely be small
added screenshot of options and result
mistyped url
Merge pull request #7 from plredmond/options

Options for the extension by plredmond!