#95 evaluate the response code of the webdav upload
 #95 corrected the upload if-statement

The if-statement which decides, if the content should be uploaded or not
was wrong.
 #95 build the url according to the document

The url to upload the content is built according to the document. To
fulfill the requirements information from the resource is needed which
had to be added to BasicImportDocumentVisualPanel.
 #95 url is the full url
 #95 fetch the appendix for the url

If a file with the same name is uploaded multiple times. A number will
be added to the filename.
 #95 create needed folders and encode the url correctly
Merge branch 'feature/95-path-to-upload-file' into dev