No longer need to strip newlines from reminders

Turns out ending a reminder line with % prevents it adding a newline, so
I don't need sed(1) to do that now
Don't background remind(1) for timed reminders

I might want this eventually, but for the moment I'm only using
remind(1) for my daily login shell
Put asterisks in front of each remind(1) item

Just for readability to distinguish it from the rest of my login spiel.
There might be a way to do this with remind(1) itself, but this will
work OK.
Forgot to update docs for install switches
Always use -H switch for sudo(8)

If we're going to pretend to be someone else with sudo(8), that should
include $HOME; prevents annoying mixed permissions in my home directory
if nothing else