Merge branch 'release/1.4.0' into develop
Change version to 2.0.alpha1.
Merge branch 'hotfix/1.4.1' into develop

Conflicts:
	CMakeLists.txt
	debian/changelog
	manager/rozofs/__init__.py
Merge branch 'hotfix/1.4.2' into develop
Fix rozodiag ps and system commands
Update RozoFS documentation (chapter SettingUpRozoFS).
1) take care of the file size for the flush
2) remove the copy of the attributes file in the file descriptor:
    the file length is always taken from the ientry cache.
Use either a virtual IP@ or a list of physical IP@ for the exportd
Up to now the exportd has a virtual IP address that was announced
on the host where the exportd was active. The other RozoFS entities
knew only this virtual IP address.
It is now not necessary to use a virtual IP address. Each RozoFS
entity that needs it, knows the physical IP address of each host
that can handle the active exportd.
For instance the rozofsmount can have in its command line either
a virtual IP address (i.e -H "192.168.10.1") or a list or physical
IP addresses (i.e -H "192.168.1.1/192.168.2.1/192.168.3.1/192.168.4.1"
By the way the exportd uses a fixed service port that can be defined
by "rozo_export_nb" in /etc/services.
Fix in ./check_rozofs_rozofsmount.sh pluggin
Use either a virtual IP@ or a list of physical IP@ for the exportd
Some fixes
introduction of the "rozofs_id" extended attribute in order to provide
direct access to files. The filename is formatted as follows:
 @rozofs@<eid>-<cid>-<layout>-<distribution><fid>-<size>
Change version to 1.5.0
Merge branch 'release/1.5.0'
Merge branch 'master' of https://github.com/rozofs/rozofs