More parallel functions

[Fredrik Johansson]

New blog post: https://fredrikj.net/blog/2022/05/parallelizing-arb-for-fun-and-profit/

Fredrik

[Stephen Crowley]

This is really cool. I've made a note to implement this in arb4j at https://github.com/crowlogic/arb4j/issues/30

Say what you will about Java but its come a long way, though I've finally started liking coding in C again now that I see gdb/CDT work so well together, it's helped

porting this stuff to Java a lot easier.  My main task now is to hunt down some memory leaks...and get this thing ready for production use.