Check that directories created by init is available when doing upload or validate

[mosbth]

As a first action one should do init which creates the directory structure on the remote server.

If one fails to do this , and later on do upload or validate a error message will appear since the directory dbwebb-kurser is missing.

desktop:~/dbwebb-kurser/python> bin/dbwebb validate hello

I will now upload files to the remote server and validate them.
Press a key to continue...
sending incremental file list
rsync: mkdir "/home/saxon/teachers/com/mosstud/dbwebb-kurser/python" failed: No such file or directory (2)
rsync error: error in file IO (code 11) at main.c(605) [Receiver=3.0.9]
rsync: connection unexpectedly closed (187 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(226) [sender=3.1.1]
dbwebb-kurser/python: Filen eller katalogen finns inte.
bin/dbwebb-validate: Command not found.

FAILED. to validate course results.

Solve this by checking that the directory-structure is there or by changing the way init works.

[mosbth]

Solve this in #25