Port to fabric2; add example config

pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires      = ["pdm-backend"]
+build-backend = "pdm.backend"
+
+
+[project]
+name = "multiball"
+dynamic = ["version"]
+description = "Run commands accross a set of hosts interactively."
+authors = [{name = "Cassowary", email="cassowary@riseup.net"}]
+dependencies = ["tqdm", "yaml-1.3", "prompt_toolkit", "fabric2"]
+requires-python = ">=3.8"
+readme = {file = "README.txt", content-type = "text/plain"}
+license = {text = "LICENSE"}
+
+[tool.pdm.version]
+source = "file"
+path = "multiball/__init__.py"
+
+[project.scripts]
+multiball = "multiball.__main__:main"
+