This patch adds the power of GocqlX to UDTs.
Now you can make a struct be UDT compatible by adding a single line.
```
type FullName struct {
gocqlx.UDT
FirstName string
LastName string
}
```
Signed-off-by: Michał Matczuk <michal@scylladb.com>
We have a structure type that implements UnmarshalCQL method.
We use it to unmarshal a user defined type. We also want to use the same struct for scanning an entire row.
There is StructScan method available in gocqlx for this purpose when iterating over rows, but no equivalent when doing a Select.
This commit introduces the possibility when doing select/get as well.
Co-authored-by: Michał Matczuk <michal@scylladb.com>
Depending on sqlx makes users pull SQL related code that is usually not
needed. Tools like dep make it easier by explicitly listing relevant
subpackages but the code needs to be downloaded anyway.
