Django-polaris

No new features

**Breaking changes:**
- `register_integrations()`'s `javascript_func` parameter renamed to `scripts_func`
- The registered `scripts_func` must accept an optional (could be `None`) dictionary
- This allows the developer to return scripts based on the page content to be rendered


**Bug fixes:**
- ensure new trustlines have a matching asset issuer in `check_trustlines`
- allow lower-case asset codes
- added `authentication_required` to `/info` endpoint
- always populate `to` and `from` fields for transactions
- Date pickers now support Portuguese translation
- `/interactive/complete` endpoint must accept `transaction_id` argument

Adds support for the `callback` and `amount` parameters for all relevant endpoints, fixes a bug found with the `watch_transactions` transaction matching function, and introduces a *breaking change* for the `interactive_url` integration function.

No new features will be released before v1.0. Only bug fixes and possible adjustments to the integration interfaces will be introduced if necessary.

Features:
- JavaScript Integration
- Fee Integration
- Support for the `callback` parameter per [SEP-24](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#adding-parameters-to-the-url)
- SEP-10 multi-signature account support

DB Schema Changes:
- Added a migration for Asset defaults

Other:
- Logging
- Improved test coverage
- Various bug fixes

The Portuguese translation files were missing several phrases. This release ensures internationalization for that language is fully supported.

Polaris now supports internationalization, specifically Portuguese. This is the last major feature to be released before 1.0.

`form_for_transaction()` was changed to `content_for_transaction()`, and its return type has also changed. See the docs for more information.

Introduces support for anchoring multiple assets and includes a redesign of the UI.


**Note:** This release introduces a *breaking change* by changing the `form_for_transaction()` return type. It also adds several packages and setup commands needed to run Polaris. The [docs](https://django-polaris.readthedocs.io/en/v0.9.14) have been updated to reflect this.