This patch completely  gets rid of fping
 - replace all fping invocations with TcpPing calls
 - update documentation accordingly.
 - associated cleanups (use constant for localhost IP, use more sensible
   defaults for TcpPing and _use_ those)

Reviewed-by: iustinp

Reviewed-by: ultrotter

- Add NEWS file with major changes between versions.
- Bump RPC version number
- No longer serialize in RPC, but just convert to dict

Old Pickle based configuration files can be converted using the cfgupgrade
utility.

Reviewed-by: iustinp, ultrotter

Reviewed-By: imsnah

I was getting into trouble with gnt-backup and discovered reading the
code of the debian-etch os image and the error logs that:
     1 - Debian os image shipped by ganeti depends on the availability
of dump and restore.

Based on that I had included in the section of "Installing the
Operating System support packages" the dependency of dump/restore and
the command to install dump/restore.

Author: Leonardo Rodrigues de Mello <l@lmello.eu.org>
Reviewed-by: iustinp

- Clean generated files on “make maintainer-clean”.
- Build _autoconf.py and ganeti.initd on “make all”.

Reviewed-by: iustinp

Reviewed-by: schreiberal

Reviewed-by: ultrotter

- Add Makefile in doc/examples/

Reviewed-by: schreiberal