Adds console.sparkline to all web pages and Chrome Devtools

Similar to console.log(), console.sparkline() lets you mix strings and other arguments, and any Array of numbers you pass becomes a pretty sparkline:

If you have some page code that already happens to spit out arrays of numbers via one of the console logger functions (and doesn't bind them at load time), you can assign console.log = console.sparkline and get them to show up for free as above; it is api compatible (besides taking over the %c handling that I think mostly nobody uses anyway).