node admin interface for Frontier Console, see spec https://github.com/ethereum/go-ethereum/wiki/Frontier-Console

- NodeInfo, PeerInfo types, PeersInfo(), NodeInfo() in eth/backend to support node admin IF
- start net only if MaxPeers > 0, close extraDb in Stop()
- defer s.extraDb.Close()

- js subcommand for vm
- console for Frontier console interactive REPL
- jspath in cli
- integrate jeth apiBindings

- camelcase fields dont play nice with otto value magic: JsonRpc -> Jsonrpc, ID -> Id
- jeth: ethereum.js rpc transport provider direct bridge between js and ethereumApi via otto jsre

- require became loadScript(), no require is supplied
- bignumber_js.go: heredoc v2.0.3 minified fixed for otto Regexp incompatibility https://github.com/robertkrimen/otto#regular-expression-incompatibility
- bignumber.min.js also updated in mist/assets/ext
- ethereum_js.go: latest master minified
- assetPath in constructor
- Eval/Exec/Handle/ToVal nice API
- jsre tests

DRY-up the use of fromHex in the project

Was previously returning nonsensical “0x”

This depends on a change in ethash which exposes UpdateCache.

This allows changing the config before starting Ethereum
with it.

There is no reason to keep them as ethutil.Bytes.

NatSpec integration

* Reimplemented nonce management for known accounts.