Merge pull request #2 from amiller/master

First commit with some bitcoin forum references in tex
Merge pull request #3 from amiller/master

Working update
Merge branch 'master' of github.com:citp/bitcoin-sok
Some refactoring. Two clear sections, one for protocols and the other for modifications. Added descriptions of the columns.

Signed-off-by: Andrew Miller <amiller@dappervision.com>