add readme and changelog

README.md

@@ -1 +1,74 @@
-backport of asyncio.TaskGroup, asyncio.Runner and asyncio.timeout
+# taskgroup
+
+a backport of asyncio.TaskGroup, asyncio.Runner and asyncio.timeout
+
+## background
+
+This is a backport of the TaskGroup, Runner and timeout code from
+Python 3.12a1 to Python 3.9, Python 3.10 and Python 3.11.
+
+## operation
+
+This project works by temporarily swapping the current task of a coroutine to a
+subclass of asyncio.Task with uncancel and context setting support.
+The advantage of this approach means that most of the operation of
+asyncio.Task will continue to be c-accelerated.
+
+## example
+
+```python
+if sys.python_version >= (3, 11):
+    from asyncio import run, TaskGroup, timeout
+else:
+    from taskgroup import run, TaskGroup, timeout
+
+async def main():
+    async with TaskGroup() as group:
+        group.create_task(task1())
+        group.create_task(task2())
+
+run(main())
+```
+
+# changelog
+
+## 0.1.1
+### What's Changed
+* Alter typing to support Python3.9 by @pgjones in https://github.com/graingert/taskgroup/pull/18
+* bump to 0.1.1 by @graingert in https://github.com/graingert/taskgroup/pull/19
+
+### New Contributors
+* @pgjones made their first contribution in https://github.com/graingert/taskgroup/pull/18
+
+**Full Changelog**: https://github.com/graingert/taskgroup/compare/0.1.0...0.1.1
+
+## 0.1.0
+### What's Changed
+* bump version to 0.1.0 by @graingert in https://github.com/graingert/taskgroup/pull/16
+
+
+**Full Changelog**: https://github.com/graingert/taskgroup/compare/0.0.0a6...0.1.0
+
+## 0.0.0a6
+### What's Changed
+* configure pre-commit by @graingert in https://github.com/graingert/taskgroup/pull/13
+* bump to 0.0.0a5 by @graingert in https://github.com/graingert/taskgroup/pull/14
+* bump version by @graingert in https://github.com/graingert/taskgroup/pull/15
+
+
+**Full Changelog**: https://github.com/graingert/taskgroup/compare/0.0.0a5...0.0.0a6
+
+## 0.0.0a5
+### What's Changed
+* Typehint the public API by @Gobot1234 in https://github.com/graingert/taskgroup/pull/1
+* Fix more type issues by @Gobot1234 in https://github.com/graingert/taskgroup/pull/2
+* Backport 3.11/12 changes by @Gobot1234 in https://github.com/graingert/taskgroup/pull/3
+* Fix support for python 3.9 by @danielnelson in https://github.com/graingert/taskgroup/pull/5
+* fix ci by @graingert in https://github.com/graingert/taskgroup/pull/11
+* Add publish script by @graingert in https://github.com/graingert/taskgroup/pull/12
+
+### New Contributors
+* @Gobot1234 made their first contribution in https://github.com/graingert/taskgroup/pull/1
+* @danielnelson made their first contribution in https://github.com/graingert/taskgroup/pull/5
+
+**Full Changelog**: https://github.com/graingert/taskgroup/commits/0.0.0a5