Setting to enable auto scroll to most recent results

[AgarwalMilan]

Thanks for creating such a great graph library. It would be more better if there could be a setting to enable the graph to auto scroll to display most recent results. Currently if there are too many graph plots it only shows the first few plots while rest are outside the screen and user needs to manually scroll the graph to view it which is not so intuitive.

[AgarwalMilan]

@lminhtm I have submitted a pull request to incorporate this behavior. Please review and merge in your existing repo.