Soc2014 meta unittests

Contains:
- unit tests for current implementation of Options
- renamed to models_meta to avoid name clashes
It would be nice to be consistent with your indentation style. Personally, I prefer:
```
data_not_concrete_abstract = models.ForeignObject(
    Relation,
    from_fields=['abstract_non_concrete_id'],
    to_fields=['id'],
    related_name='fo_abstract_rel'
)
```
over
```
friends_abstract = models.ManyToManyField('self', related_name='friends_abstract',
                                          symmetrical=True)
```
Feel free to have lines that are longer than 80 characters, like:
```
m2m_abstract = models.ManyToManyField(Relation, related_name='m2m_abstract_rel')
```
if it improves readability.