* Fixed a bug in the ProtonMail importers (pmkey-*.py) where multiple
keys found for a username would always result in the last email
address checked being returned in the printed output for all located
keys.
* Added more comprehensive examples using hkp4py and added a couple
more example scripts for protonmail.
Tested-by: Ben McGinnes <ben@adversary.org>
Signed-off-by: Ben McGinnes <ben@adversary.org>