Add findPeopleInShows

There are now two commands that search all of IMDb data, not just the shows added to your favorite shows.
findPeopleInShows.sh and findShowsWith.sh

All programs that used to require a show name or person name as a parameter will now prompt if no parameters are entered.

Parameters still work if you prefer, but the prompted version doesn't require quotes around parameters with spaces.

Remaining work is primarily completely revising the README to focus on prompted and menu driven driven user experience.