added location meta information and special tag
added event layout
added ical generator
added next meetup tag
converted first post to event
added ri_cal to gemfile
added additional dependencies to gemfile
2 small formatting errors
converted all posts
added missing locations
make location url optional
added TODO
fixed mistake
fixed baseurl setting - renamed to siteurl
Merge pull request #14 - iCal generation, thanks to @nougad