server (tasks): refactoring: - moved `TasksManager` to `server.tasks.manager` - tasks modules now must have a `Task` class which will be instanciated by TasksManager - `server.tasks.task` has a basis for `Task` class - `Task.prepare` can now be asynchronous - `importlib` is now used to import tasks, instead of exec - tasks are now parsed/run after pages are imported - `server.BackendReady` is now a coroutine - type hinting for Task attributes

include MANIFEST.in libervia/VERSION
global-include *.py
global-include *.ini
global-include *.po *.mo
global-include CHANGELOG COPYING* INSTALL README*
global-include *.sh
global-include Makefile *.rst *.bat
include src/browser/public/*
include themes
include doc
recursive-include src *.js
exclude *.sh
global-exclude *.un~
global-exclude *.pyc
prune output
prune html