SMB support

[tobihagemann]

Add SMB support. TODO details.

[SailReal]

Until we implement this feature, you can use applications such as https://github.com/wa2c/cifs-documents-provider which will connect to your SMB share and create a document provider for us to use. You can then connect to the document provider using the "Local Storage" cloud connection in Cryptomator and add/create vaults using the document provider which uses the SMB connection under the hood.

CIFS Documents Provider is available in Google Play, F-Droid and Amazon Appstore