Improved selector management enabling and disabling the empty option in
case there is any checked host.
Improved dict management and eventloop session
Improved urls definitions
Implemented get_ip_from_hostname and get_hostname_from_ip functions to
get either, hostname from ip or ip from hostname, this way we can try to
start an ipmi session using ip if the hostname is not in dns
Modified check if host is hostname or ip address. Deleted netaddr
library not needed.
Fixed error in case the 144 nodes were selected. Improved jquery syntax.