ui: Remove superfluous images
ui: Include oraclelinux icons
ui: Include oraclelinux in IMAGE_ICONS setting
branding: Change description on setup.py

* Change short description on setup.py
* Update copyright date on setup.py
astakos: Rename xeraki_hover.png to hand_hover.png
docs: Remove deprecated section from install guide
ui: Update message on network tab if no nets found

* Change the message on the Network tab of the Cyclades UI, if the user
has no networks.
cyclades: Bug fix in IP create, if no nets exist

* Use the proper message if no networks exist when creating an IP
address
* Update date on copyright notice
Fix various unicode issues

Substitute ``synnefo.util.text.uenc`` occurrences
with the respective django encoding utilities
cyclades: Allow floating IPs from drained networks

This commit makes possible to create a port to a drained network when
using a floating IP that has been already allocated. The 'drained' flag
should only affect the allocation of new IPs and not the use of existing
ones.