I ran through the README, adding sudo to the relevant commands. I also adjusted the code style slightly. (I removed the #s in front of commands, added spaces after headers, and unjustified some of the explanatory paragraphs. I also spellchecked and removed some redundant pieces.)
This is a fix for #123.
fixed code fragments needing `sudo` prepended
fixed some markdown style issues
removed duplicate 'ruby library' and 'cjdns-tool' entries under the admin interface section
made some spelling changes
modified one code block's style