remove twitter widget from landing page for now
Update message displayed to non logged in users
add tests for homepage event
display event on events page
move email creation to session_invitation
add events!

(partly hardcoded)
Merge pull request #167 from despo/add-events

add events!
add event invitations!
Update event page & display coaches
event invitation mailer
send event emails
return false if a user is not logged in
an event organiser can manage attendances
Merge pull request #168 from despo/events

Events
display number of invitations sent
Merge pull request #169 from despo/improve-event-admin

display number of invitations sent
check for blank not nil!
Merge pull request #170 from despo/patch

check for blank not nil!
add travel expenses in faq
Merge pull request #171 from despo/include-travel-info-in-faq

add travel expenses in faq