Unable to use time.Time on MySQL driver.

```
type Test {
	Reference string    `db:"unique" column:"reference"`
	Starts    time.Time `column:"starts"`
	Ends      time.Time `column:"ends"`
}
```

The above stores fine but upon querying I get:

```
ERROR: sql: Scan error on column index 2: unsupported Scan, storing driver.Value type []uint8 into type *time.Time
```
