Data migration for Django 1.7

Signed-off-by: Michal Čihař <michal@cihar.com>
Use per resource license field

Issue #507

Signed-off-by: Michal Čihař <michal@cihar.com>
Use new_lang field from a resource instead of a project

Issue #507

Signed-off-by: Michal Čihař <michal@cihar.com>
Use merge_style from a resource

Issue #507

Signed-off-by: Michal Čihař <michal@cihar.com>
Use commit_message from a resource

Issue #507

Signed-off-by: Michal Čihař <michal@cihar.com>
Use commiter info from a resource

Issue #507

Signed-off-by: Michal Čihař <michal@cihar.com>
Remove configuration fields from a project

These have been moved to the resource

Fixes #507

Signed-off-by: Michal Čihař <michal@cihar.com>