add scripts for adding in old data

**not ready for merge**

To merge in the old AWS data into the new tenant-schemas setup, first get your machine setup for tenant schemas. 

Then use `general scripts/import.sh` to download and import the old `atlanta` DB. 

Current importing traceback:

```
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/tenant_schemas/management/commands/__init__.py", line 71, in handle
    *args, **options)
  File "/usr/local/lib/python2.7/dist-packages/tenant_schemas/management/commands/__init__.py", line 61, in execute_command
    call_command(command_name, *args, **options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 159, in call_command
    return klass.execute(*args, **defaults)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/loaddata.py", line 55, in handle
    self.loaddata(fixture_labels)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/loaddata.py", line 84, in loaddata
    self.load_label(fixture_label)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/loaddata.py", line 140, in load_label
    obj.save(using=self.using)
  File "/usr/local/lib/python2.7/dist-packages/django/core/serializers/base.py", line 164, in save
    models.Model.save_base(self.object, using=using, raw=True)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 573, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 635, in _save_table
    forced_update)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 679, in _do_update
    return filtered._update(values) > 0
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 510, in _update
    return query.get_compiler(self.db).execute_sql(None)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 980, in execute_sql
    cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 786, in execute_sql
    cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 69, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 99, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
django.db.utils.IntegrityError: Problem installing fixture '/code/tmp/dump.json': Could not load contenttypes.ContentType(pk=2): duplicate key value violates unique constraint "django_content_type_app_label_model_key"
DETAIL:  Key (app_label, model)=(south, migrationhistory) already exists.
```