adding speakers as csv string to email template context
Sending email to all speakers per proposal
Adding eg for speakers in email notification template
remove adding to_address, as the primary speaker is already a member of self.proposal.speakers()
Merge branch 'develop' into feature/77-co-speakers-email-notifications
Merge branch 'develop' into staging
Merge branch 'develop' into staging
Merge branch 'feature/re-enable-social-auth' into staging
Merge branch 'develop' into staging
Attach message to multiple financial aid applications
Field changes for #196

* Rename Travel Prefered Disbursement field to Disbursement Notes
* Remove fields:
  * Travel signed
  * Travel check number
  * Tutorial amount
Adding registration signage to the homepage, refs #198
Document how sending email to financial aid applicants uses templates works.

Part of #196.
Merge pull request #200 from caktus/198-homepage-signage

198 homepage signage
Merge branch 'staging' of https://github.com/caktus/pycon into staging
Merge branch 'develop' into staging
Merge pull request #201 from caktus/feature/196-finaid-email-doc

Document how sending email to financial aid applicants uses templates works.
Merge pull request #191 from caktus/feature/191-finaid-mass-note

Add mass note to finaid apps
Change migration to use rename column instead of deleting and adding
Increase height of registration iframe

The height of the tallest registration page is currently 1255.
That needs to fit into the iframe without scrolling, so set
iframe height to 1400 to leave a little room for the page to
get a little bigger.