ready for technical review
added note on sudo usage to znc guide
Revised VNC guide to address security concerns.
Removed ZNC guide from pull request.
Updates to VNC guide
Merge branch 'vnc' of bits.linode.com:jstewart/docs into vnc

Conflicts:
	docs/applications/remote-desktop/using-vnc-to-operate-a-desktop-on-ubuntu-12-04.md
Performed requested edits
Added instructions for saving and initiating Putty tunnel.
Added note to replace username and domain in SSH connection string.
Added note to replace domain in putty configuration screen.
Merge pull request #11 from jstewart/vnc

Revised VNC guide for additional security.