Remove outdated material
update abstract
include pdf as part of repository
added a vocabulary appendix to the whitepaper
update introduction
managing sectors section
added section 'Use Cases'
add basic economics, leave out advanced economics
delete outdated parts of whitepaper
explain the full quorum algorithm

add luke to the contributors list
delete some outdated stuff that has since been updated
add proof for consensus algorithm
explain block compilation
add proof-of-storage
touch up storage proofs and random number generation
quorum integrity
make RPC the default
pass a message router to up/download
make SendMessage a method of RPCServer
make zeronetwork implement MessageRouter
update server for RPC