Support for strfmt.DateTime to datetime mapping to support go-swagger generated models

[solcates]

Digging gorp, and in my pursuit of using it to connect to a legacy DB, I found that the swagger generated models, didn't match up with strfmt.DateTime (what go-swagger generates strings of time date-time)... So i added it.

In swagger yaml use this...

  legacy_user:
    type: object
    properties:
      id:
        type: integer
        format: int64
        x-go-custom-tag: db:"id"
      last_login:
        type: string
        format: date-time
        x-go-custom-tag: db:"last_login"

[solcates]

Added "Date" type for mysql as well

[solcates]

Added "unique" reflection support to create unique columns i.e. email etc...

[nelsam]

This seems reasonable. Can you include a test that fails without these changes?

[solcates]

Sure will add that sometime this week

[nelsam]

@solcates have you had time to work out a test for this?