add in_progress method to event.
make events sortable by start time.
Enable in progress events. Use EventContainer class as superclass for day.
Show in progress events on front page.
Merge pull request #68 from ronan-mch/#65_issues_in_progress

#65 issues in progress
Close #67. Missing translations.
Add bootstrap icons.
Add bootstrap icons. Close #66.
Create bug?
committed in error.
#74 - add price field
Close #74 - whitelist price param.
Close #75 - delete useless button.
Close #72.
Update fixtures - enable comments.
Close #81 - fix comments on event show page.
Fix breaking error.
#77 add vendor fonts to search path.
#73 - location description in popover.
Close #84 - hide In Progress header when no events in progress.