* import-key.py: fixed a minor typo. * pmkey-import.py: locates and imports keys from the ProtonMail keyserver. * pmkey-import-alt.py: the same as the previous except with setting an alternative $GNUPGHOME directory.
* Made sure all example scripts meet PEP8 compliance. * Required fixing approx. a dozen of them in minor ways.
* Added an example script for importing a key from a file (either ASCII armoured or not).