Merge pull request #29 from benedikt/master

Group activities by date for improved readability
add team supervision comments for supervisors
display email addresses to organizers
add a comment mailer to notify supervisors
whoops. actually email supervisors, not the commented team
compact supervisor email addresses, just in case
fix typo in CommentMailer
fix syntax error, thanks @benedikt
Merge branch 'master' of github.com:rails-girls-summer-of-code/rgsoc-teams
add blog post info per team for anika :)
Change Discovery#tags regular expression to match multi line tags
Merge branch 'master' of github.com:rails-girls-summer-of-code/rgsoc-teams