Added option to not use jQuery

[hrbrmstr]

I added "_raw" functions in dsvg.cpp and a use_jquery parameter (defaulting to TRUE) to send_tooltip, send_click and send_data_id to enable setting of data attributes and other attributes without jQuery. I also added "without jQuery" equivalent tests to the test harness and made initial changes to a local copy of ggiraph to see how well it works (and it works well :-)

This lays the groundwork for making a jQuery-independent widget in ggiraph.