ethstats: check if received event is valid

cmd/geth: tidied up the source

ethstats: don't drop concurrent head reports (mini forks)

node: improve error handling for web3_sha3 RPC method

* miner: removed unnecessary state.Copy()

* eth: made use of new miner method without state copying

* miner: More documentation about new method

cmd: drop DAO related choice flags since ETC diverged

ethstats: report block miner, gas limit and gas consumption

* cmd/bzzd: add missing p2p/discovery flags
* cmd/bzzd: fix two bugs crashing bzzd if bootnodes flag given
* cmd/bzzd: make no swap default, renamed flag bzznoswap->bzzswap
* internal/web3ext: correct methods for bzz IPC module
* cmd/bzzd: ethapi param not mandatory. Warning if no blockchain
* cmd/bzzd: correct default IPC modules in help string
* cmd/utils: fix help description for networkId - add Ropsten
* cmd/bzz, swarm/api, swarm/network: add swarm networkId flag
* cmd/bzzd: change nosync flag to sync and BootTFlag

Improve hex encoding/decoding

build: use single CocoaPods package, pre-release dev builds

common.Address JSON encoding now enforces the 0x prefix, but key files
don't have the prefix.

The new package is purpose-built to handle the encoding consumed and
produced by the RPC API.

Fixed unwinding of bad hashes when already on the canon chain

accounts: disable file system watcher on windows

internal/build: use 'git tag --points-at' to get the current tag

The watcher is unreliable and causes test failures on Windows.
Disable it until we have a better solution.

This should restore support for building with git 1.x.