rename node to peer and define it at the start, suggestion from @dwaite
moving sybil/age description into this doc
demoted wikipedia reference as it's a mish-mash
add some hrefs, soften age tracking language, and talk about seek requests
clarifying a few more points
rename doc to dht
document how to use paths to get public ip/port now
minor clarification in link see responses
Merge pull request #18 from telehash/buckets

proposal to use channel for bucket maintenance
fixed minor merge conflict