created minimum viable product for orphan create form in active admin

part of PT story https://www.pivotaltracker.com/story/show/76239618
- added create form with only required fields for orphan and all fields
  for addresses
- index view
- show view does not show address information yet
- new migration that drops key fields in orphan and puts them in address
  so an orphan now has_one address rather than belongs to address for
  current and original addresses
- migration has been built with extra information to make it reversible
- changes orphan_spec to model change in relationship between orphan and
  address
added all optional field to orphan form model

part of PT story https://www.pivotaltracker.com/story/show/76239618
rename guardian_id col in orphans table
Added Orphan Status + Orphan views
orphan views specs
removed unneeded comments
Merge pull request #33 from motasem-salem/orphan_form

Orphan form