Update "Author" section in README.md
Fix #1, too restrictive assertion error
Fix #2. UnicodeDecodeError when storing email. codecs.open should not be used as this is not unicode
Fix error (in email header) introduced in 63f2277b43e8c5783c7718b176bf8a09d7c29b3e (PEP8)
locale.getpreferredencoding() can in some cases return None. In that case use UTF-8