Pwiz requires workaround for columns beginning with numbers
I'm trying out peewee on one of our existing development mysql databases. I've run pwiz and generated a database model. I've noticed a python/db problem with class variables starting with numbers. Does peewee have a solution for dealing with this issue? I couldn't find anything addressing this problem in the documentation.

```python
class AshFinderGryM2F2G3F3G4Rat1D3HMin13ETests(BaseModel):
    4m5_min = FloatField()
    alarm = IntegerField()
    alarm1 = IntegerField()
    alarm2 = IntegerField()
    alarm3 = IntegerField()
    ...

class AshFinderRayRealdaytimeTests(BaseModel):
    10_perc_4m5 = FloatField(null=True)
    10_perc_ash_group_num_pix = IntegerField(null=True)
    90_perc_4m5 = FloatField(null=True)
    90_perc_ash_group_num_pix = IntegerField(null=True)
    alarm = IntegerField()
    alarm_4m5 = IntegerField()
    ...
```

--- received in contact form sent through my site.