added seeds json format definition
Added document for tracking refernces
Merge branch 'master' of github.com:telehash/telehash.org into buckets
Merge pull request #21 from fd/fd-references

Added document for tracking refernces
renaming channel to link and moving to main protocol doc
adding in extra detail almost verbatim from @dvanduzer
Merge branch 'master' of github.com:telehash/telehash.org into buckets
adding references pointer