Fix picklists and multipicklists for SF Integration
Fix connector to support mapping hashes for SF in models. Map all the fields in organization and field_host models to SF. Create en.yml for organization
Map all the fields in student_application, student, reference,  models to SF. Create en.yml for student_application, and update en.yml in student
Add state field to address for student application, also fix the experience field to sync with SF
Skip min and max image size validation in seeds file.
First approach to ywam_references. create a many to many polymorphic relation betwee fieldhost/student and reference through person_reference class
Fix creation of references on student application form.

"blank" reference forms were not being properly excluded in the student
application form after the internal relationships were refactored to
many-to-many.

The student application attributes were being setted twice, causing
person references to be duplicated.
Fix javascript validations for students/setup after refactoring References. Add javascript validations in projects/setup for YAWM references after refactoring References model.
Improve PersonReferences and References features in project/setup and
student/setup. Integrate person_references and references in
students/setup and projects/setup with SF. Fix for null values in
picklists and multipicklists in SF.
Add integration with braintree in student show page
First approach for donations
Add button group for the donation amounts
Add recurring billing with subscriptions
Move text from forms to en.yml
Clean up styles for donations form.
Remove '$ other amount' button from the options, let just the amount text field
Specs for donation controller, implements fake_braintree
Fix for issue #50 'students/setup breaks on donations branch.'
Put "other amount" donation input on same line as button group.
Improvements for pull request #51 branch sf_integration