add is_free param
Merge pull request #80 from AlexandreJouve/feat-13

add is_free param
fix is_free param
fix calendar links not working
Merge pull request #123 from AlexandreJouve/fix-calendar-links

fix calendar links not working
Merge pull request #122 from AlexandreJouve/feat-13.2

fix is_free param
add filter by tags
fix url and and changes tags/events pages

tag/events pages now include a new 'event.html' file