Add screenshot link
Allow multiple instances to run at the same time.
Fix padding problems on the "spare change of millions of years" space.
Fix checkmark not regressing from "yr" to "date"
Added padding zeros to percentages
Fix year zero problem

(partially – now the thing runs from AD 2 – 1 – 0 – 1 – 2 BC, but technically it should run AD 2 – 1 – 1 – 2 BC.)