Remove folder traversel

[fkalis]

Folder traversal is inefficient and error-prone. Setting the root folder via ID is not very user friendly.

Create empty folder (necessary for feature #25)

POST https://graph.microsoft.com/v1.0/me/drive/root:/this/path/will/be/created:/children

{
    "name": "withSubfolder",
    "folder": {}
}

or

PATCH https://graph.microsoft.com/v1.0/me/drive/root:/this/path/will/be/created/withSubfolder

{
    "folder": {}
}

Beforehand verify, that the folder does not exist yet, so it does not have to be touched

GET https://graph.microsoft.com/v1.0/me/drive/root:/this/path/will/be/created/withSubfolder

If this returns with status code 404, the folder can be created

Upload file (folder will automatically be created)

PUT https://graph.microsoft.com/v1.0/me/drive/root:/containing/folder/name/filename.txt:/content

This is the content.

An upload session can be requested via

POST https://graph.microsoft.com/v1.0/me/drive/root:/containing/folder/name/filename.txt:/createUploadSession

...