Removed PEER, Fixed #183

```bash
$ grep 'peer' * -rin | wc -l
       0
```

 - Removed all peer stuff.
 - Adjusted documentation, .xml etc
 - Abstracted connection handling, so we don't deal with `PDOStatement` directly anymore.
 - Abstracted OM build process
 - Made `populateObjects` name-indexed compatible

Fixed #183