[Owncloud] External filestorage support for RapidShare

[Philipp Kapfer]

Hello all,

I'm currently developing a new backend for the external filestorage app, 
namely support for (the former one-click hoster, now "secure data 
logistics" provider) RapidShare.com - to be more exact, as per now it is 
already in the testing stage.

The new filestorage backend supports the usual file and directory 
management - list, create, edit, delete, ... you name it. In addition, 
any file operations (for example, modifying a file) are done directly on 
the RapidShare server without creating any temporary files on the 
ownCloud server. This was the major reason for selecting RapidShare as 
storage provider, because they allow low-level access to their files. 
That's a huge difference to the other backends currently implemented, 
because all of them first create a full temporary copy of the file, 
which is a waste of disk space, bandwidth and time, especially for big 
files.

Of course, the backend still has some rough edges, which is the reason 
I'd like to invite everyone to test it - I'd be especially glad for any 
RapidPro users, because they are not only able to use low-level file 
uploads, but also low-level downloads, which may have a difference 
performance-wise.

Unfortunately, I'm new to Git(Hub) and ownCloud development, so I don't 
know the habits. How should I proceed to give others access to the code, 
and what has to be done to have the classes integrated into the main 
branch later when it's finished?

Cheers,
Philipp