Intial work on Linux-IO iSCSI script

Can set up a basic iSCSI Target device. This is by **no means** complete yet

Sample command for ocf-tester:

ocf-tester -v -n p_target \
                 -o iqn=iqn.2014-04.com.target:d0a-lun \
                 -o portals=0.0.0.0:3260 \
                 -o initiators=iqn.1993-08.org.debian:01:b58ac8461796 \
                 -o luns="test=0" \
                 /home/philipg/ocf-lio/iscsi

Signed-off-by: Philip Gaw <philip.gaw@linn.co.uk>