* allow to use one application for multiple repositories
* update tests
* handle None append argument everywhere
* rewrite repository definition logic
* drop optional flags from docs
* support of new schema in systemd units
* add migration docs and ability to migrate tree automatically
* use repostory id instead
* verbose multiarchitectureerror
* object path support for s3 sync
* fix tests after rebase
* migrate docstrings from reST to google format
* add raises note
Also change behaviour of the `from_option` method to fallback to
disabled instead of raising exception on unknown option
* fix part of warnings for sphinx
* make identation a bit more readable
* review fixes
* add verbose description for properties to make them parsed by sphinx extenstion
* add demo sphinx generator
* add external process spawner and update test cases
* pass no_report to handlers
* provide service api endpoints
* do not spawn process for single architecture run
* pass no report to handlers
* make _call method of handlers public and also simplify process spawn
* move update under add
* implement actions from web page
* clear logging & improve l&f
