Mia-accounting

The first formal release in Flask.

Removed the zero balances from the trial balance, the income statement, and the balance sheet.

* Renamed the project from "mia-accounting-flask" to "mia-accounting".
* Updated the URL of the reports, as the default views of the accounting application.
* Updated README.
* Various fixes.

* Added the unauthorized method to the UserUtilityInterface interface to allow fine control to how to handle the case when the user has not logged in.
* Revised the JavaScript description editor to respect the account that the user has confirmed or specifically selected.
* Various fixes.

* A distinguishable look in the option detail than the option form.
* A better look in the new journal entry forms when there is no line item yet.
* Fixed the search in the original entry selector in the journal entry form to always do a partial match, to fix the problem that there is no match when typing is not finished yet.
* Fixed the search in the original entry selector to search the net balance correctly.
* Replaced the "editor" and "editor2" accounts with the "admin" and "editor" accounts.
* Various fixes.

Moved the settings from the .env file to the option table in the database that can be set and updated on the web interface. Added the settings page to show and update the settings.