Add to Melpa

[telotortium]

This would make it easier to use in org-gcal (see kidd/org-gcal.el#200).

[telotortium]

Instructions for Melpa are at https://github.com/melpa/melpa/blob/master/CONTRIBUTING.org. We should merge #4 and #5 before adding to Melpa.

[MartinNowak]

Seems to be ready @telotortium.
I submitted a recipe to melpa for org-caldav and to replace the vendored version in kidd/org-gcal.el#200.

[boogsbunny]

This package has already been added to MELPA, so you can close this issue.