* Refactor asyncio locking system for Python 3.7 support. Ref https://github.com/GNS3/gns3-gui/issues/2566 Ref https://github.com/GNS3/gns3-gui/issues/2568
* Use asyncio.ensure_future() instead of asyncio.async() with conservative approach to support Python < 3.4.4. Fixes https://github.com/GNS3/gns3-gui/issues/2566
* Forbid controller and compute servers to be different versions. Report last compute server error to clients and display in the server summary.
* Fix exception with short names for Dynamips interfaces. Fixes #1386.