This mostly changes how information is passed around.
Instead of using many function parameters and return values,
put the entire state in a struct and pass that.

This also adds back derivation of ecdhe-shared-secret. I deleted
it by accident in a previous refactoring.

JIT build fixes

Conflicts:
	cmd/utils/cmd.go

Conflicts:
	eth/block_pool.go
	eth/block_pool_test.go
	eth/protocol_test.go
	miner/worker.go

[WIP] Update Readme 

Updated JSON log events

Remove Websockets RPC transport

- best peer cannot be idle for more than idleBestPeerTimeout
- introduce ErrIdleTooLong fatal error
- modify default values

9e3fe72 update state root hash

git-subtree-dir: tests/files
git-subtree-split: 9e3fe720e3d46f046e06a91e45c881e79557f721

13be3e3 update

git-subtree-dir: tests/files
git-subtree-split: 13be3e33afa8d708786f82b63bf874138f05bb02

402e748 Merge branch 'PoC9' of github.com:/ethereum/tests into PoC9
13b6a99 State test refill.

git-subtree-dir: tests/files
git-subtree-split: 402e7482f9283e08869b3412329e24ef6287d8c7