codegangsta/martini-contrib — pull request #63 by rday (2013-12-15 19:09:19+00:00)
Title: Allow users to ignore certain fields in their structs during binding

I have some objects which I would like to read in from Form data, but those objects have unexposed fields which break the reflection. This pull request allows users to mark fields as "ignored", very similar to how Gorp has ignored fields in models.

Example:

```go
type UserModel struct {
Username string `form:"user_username"`
Password string `form:"user_password"`
Email string `form:"user_email"`
authenticated bool `form:"-"` // This field will be ignored
}
```