Fix template tag image obj is string no obj
Create core forms, add model_choices
User core form to get model_choices
create field admin form, add application choice lazy model_choices
used ModelAdmin in field admin
Merge branch 'master' of github.com:opps/opps into jsonfield

* 'master' of github.com:opps/opps:
  Fix template tag image obj is string no obj
Fix get/set field value
update checkbox template, used multi options
Add new model option to add field options if exist (radio/checkbox)
set new field name via options
create dynamic form field to json field
add field option inlne on admin json field
set readonly if exist field