nbmetaclean app

What's Changed

• Fix_nox by @ayasyrev in #68
• fix apps - imports and __futures__ annotations by @ayasyrev in #69
• Test_app by @ayasyrev in #70
• Test_app by @ayasyrev in #71
• Test_app by @ayasyrev in #72
• Test_app by @ayasyrev in #73
• App_nbmetaclean by @ayasyrev in #74
• v 0.1.1 by @ayasyrev in #75

Full Changelog: 0.1...0.1.1