add RPC stateAt
Merge pull request #316 from caktux/rpcstateat

add RPC stateAt
use s for stateAt block number param to prevent conflict with bData and such, some style fixes
Merge branch 'develop' of https://github.com/ethereum/cpp-ethereum into rpcstateat
Merge pull request #317 from caktux/rpcstateat

use s for stateAt block number param to prevent conflict with bData and such, some style fixes
Fix for io service (thanks, alex!)
Blocks come down in order (well... unless a peer bugs out).
Peer hash-chains downloaded one-at-once.
KillChain works again.
Local networking option.
Don't resend blocks during sync.
Merge branch 'webthree' into develop
Merge fix.
eth web3 fix.
Minor fix for mining.
fix nick's warning.
Add RangeMask.
Add DownloadMan for download management.
User DNS & poc-5.ethdev.com for peerserver.
Everything using PoC servers.
Merge branch 'downloadman' into develop
Debug code for peer discovery.
Merge branch 'downloadman' into develop
Allow peers to tell us of their actual IPs.