fix settings and errors in three orphan excel file

fix orphan import issues identified by @robbiejackson
- Column R (guardian relationship) should be String not Integer
Merge pull request #222 from PurityControl/excel-config-fix

Excel config fix
O295: Sponsorship start_date validation - must be Date format +rspec and cucumber
O296: Sponsorship start_date validation: not later than the first of next month +rspec and cucumber tests
refactoring: rspec and cucumber tests and more
Merge pull request #224 from razorcd/O295andO296_sponsorship_start_date_validation

OSRA-295 OSRA-296 #Resolved
Model Sponsorship end_date validation + rspec tests
rebase, solved conflicts
after code review
Merge pull request #226 from razorcd/O294_sponsorship_end_date_validation

OSRA-294 #Resolved OSRA-298 #Done
Merge pull request #227 from AgileVentures/develop

Push develop to staging