Separated stdlib imports from other imports.

Adding a new error that will fire when trying to use One(), All() or Next() without closing the initial result set.

In all the mysql and sqlite and postgresql wrapper,fun toInternal in collection.go.

Reserved to the millisecond:
```
return fmt.Sprintf(TimeFormat, int(t/time.Hour), int(t/time.Minute%60), int(t/time.Second%60), t%time.Second/time.Millisecond)
```