Several fixes based on my own outlook rules and some doc changes

Changed the output name to reflect the name used in outlook.  Handled the case
of multiple Sender addresses in the same rule (different from using the From:
address), move to trash actions, handling rules that have no action analogue in
Gmail filters to not go to output.  Made a couple of notes in the README.MD to
reflect my experiences as different from author.

P.S. this is my first pull request, so please let me know if I handled the process wrong