cal: basic addon layout
added MIT License file
cal: basic README added
cal: added settings functions
cal: added user config
cal: export to ical
cal: added CSV export
cal: user settings info about supported formats
cal: added csv support to the README
cal: added tarball
cal: missing export in README
cal: added TODO note to CSV export
cal: cleanup the README
cal: code cleanup
cal: CSV date now is YYYY-MM-DD
Merge pull request #132 from tobiasd/cal

export events as ical or csv calendar file