Issue 14 create model for registrant details

[fifibox]

Change Summary

• created RegistrantDetail model and a placeholder Registration model
• registered the model in admin site

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Related issue

• Resolve Create model for registrant details #14

[SafetyInObscurity]

Good work but a few issues.

Additionally there appears to be some confusion between "blank=True" and "null=True".

• "blank=True" Allows forms to be submitted without this field filled.
• "null=True" Allows the value of a field to be NULL in the database (as an alternative to an empty string)

All user-submitted fields should have "blank=True". "none=True" is only necessary when we want to distinguish between fields that haven't been filled yet and those left intentionally blank.

[fifibox]

Do I need to add "null=True" to any fields?

[SafetyInObscurity]

Do I need to add "null=True" to any fields?

Null is useful for when a field doesn't have a meaningful "not submitted" value. So it's not really necessary for charfields because they can be an empty string, but it's useful for dates or Booleans because otherwise they're forced to be a random date, or True or False.

[SafetyInObscurity]

Well done Fiona. This looks ready to merge!