minor typo

minor typo
Merge pull request #73 from steverob/patch-1

minor typo
add change of session details email
Merge pull request #74 from despo/change-of-details-email

add change of session details email
Feedback invitation mailer.
Make tests pass. Refactor code dealing with feedbacks.
fix typo on sponsoring page
link sponsoring page
Merge pull request #76 from despo/update-and-link-sponsoring

Update and link sponsoring
update emails, remove session title, rename to workshop
display attendances in invitation page
update attendance confirmation email
update wording session -> workshop
remove link to session page
remove matching session title and description
in homepage
Merge pull request #77 from despo/update-emails-and-rename-session-to-workshop

Update emails and rename session to workshop
Merge branch 'master' of https://github.com/codebar/planner into student_feedback
Refactor. Add aditional test. Make feedback rake task more informative.
Adjust feedback rating validation message
Improove feedback request email text