Propagating errors from OSD communication back through the client. An

issue are TIMEOUT and CONNECT errors. They will lead to an I/O error.
Actually these should be retried (request resent), but doing so
immediately blows up the client due to too many open file descriptors.
The useless sockets aren't cleaned up by neon, and stay around until they time
out. Need delayed re-queueing to get around this.
Commit contains also automatic coding style "fixes" done by the IDE :-(


git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@54 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534