Make ssh lookup a tad more robust

If hostname is missing, as it typically is when your ~/.ssh/config
contains a wildcard entry, _sshconf_lkup() would bail out with an
exception. We now handle the lack of hostname in a more robust fashion,
just like is already done for port.
Merge pull request #81 from plajjan/robustify-ssh

Make ssh lookup a tad more robust
fix #84
Merge branch 'master' of github.com:jeremyschulman/py-junos-eznc
updates
added description to PhyPortView
Merge pull request #89 from pamelia/master

added description to PhyPortView
updates
updates
fixing scp issue
updates
updates
updates
Merge branch 'master' of github.com:Juniper/py-junos-eznc
Add ARP table fetching

Now possible to fetch ARP table!
Basic fetching of BGP peer data
Merge branch 'arp-table'
Merge branch 'fetch-bgp-peers'