Remote-job tagging.

Change to:

```python
op.add_column('jobpost', sa.Column('remote_location', sa.Boolean, nullable=False, server_default=0))
op.alter_column('jobpost', 'remote_location', server_default=None)
```

Also, in the interest of avoiding future confusion over the name `remote_location`, we should consider the names `anywhere` or `telecommuting`.