register UUID[] type parser same as TEXT[]

Columns of UUID[] (uuid arrays) get returned unparsed. To fix this in application code I had to add:

```
var pg = require('pg');
pg.types.setTypeParser(2951, pg.types.getTypeParser(1014, 'text'));
```

Since the UUID type has been around in postgres since 8.3 with the same oid (2950 for UUID and 2951 for UUID[]). It would be nice to have this parser registered by default.