Merge pull request #13 from Chris00/master

Display exception arguments in REPL + factorization and respect RFC 4287 about `<author>`
Merge pull request #15 from Chris00/master

Parse times with fractional seconds
Merge pull request #18 from Chris00/master

'Z' when no timezone + RSS2 parsing
Rename analyze to parse
More versatile detection of <channel> for RSS2
Filter out prefixed tags for RSS2
Fix parsing of timezone for RSS2
Atom: allow empty subtitles
RSS2: allow the day of the week not to be present in dates
RSS2: allow channel/description to be empty