tinyio v0.2.1

• Feature: added tinyio.{to_asyncio, to_trio, from_asyncio, from_trio} for integrating with other event loops.
• Bugfix: calling loop.run whilst it is already running will now correctly raise an error.
• Bugfix: calling loop.run on an already-completed coroutine will no longer return None.

Full Changelog: v0.2.0...v0.2.1