Git-annex-remote-googledrive

Changes in this release:
* Fix bug which prevented the option `mute-api-lockdown-warning` from being changed 45
* Lockdown warning is now automatically muted when using own API keys
* Option `token` is again available (though it should not be necessary generally, but it was re-added to work around issues like 44)
* Automatically strip white spaces from the input during setup, to prevent problems when copying API key and secret directly from the developers console

Changes in this release:
* Allow own API key (42)

* Check if setup is run inside git repo
* Gracefully shutdown on SIGINT and SIGTERM

Large parts of the application have been re-written for this release. This enables awesome features, of which the following already have been implemented:

* True resumable up and download
* Fine grained progress report during transfer

Additionally, any network connection is now deferred to when it's actually needed, so commands like `git annex whereis` and `git annex info` are now a lot faster.

* Small bugfixes
* Notification regarding [Google Drive API lockdown](https://github.com/Lykos153/git-annex-remote-googledrive#google-drive-api-lockdown)

New features:
* Retry on Connection Error 2
* Easy migration from git-annex-remote-gdrive and git-annex-remote-rclone 3 4
* Clean up test keys on startup 14
* Consistency check for export remotes 7
* Option to specify folders by ID (eg. for shared folders) 15
* Bugfixes