common: fix ethereum#1818, secondary datadir paths to fall back to

core, trie: new trie

This PR solves an issue with the chain manager posting a
`RemovedTransactionEvent`, the tx pool will try to
acquire the chainmanager lock which has previously been locked prior to
posting `RemovedTransactionEvent`. This results in a deadlock in the
core.

core: deadlock in chainmanager after posting RemovedTransactionEvent

eth/downloader: match capabilities when querying idle peers

Moved the filtering system from `event` to `eth/filters` package and
removed the `core.Filter` object. The `filters.Filter` object now
requires a `common.Database` rather than a `eth.Backend` and invokes the
`core.GetBlockByX` directly rather than thru a "manager".

* Moved `vm.Transfer` to `core` package and changed execution to call
`env.Transfer` instead of `core.Transfer` directly.
* core/vm: byte code VM moved to jump table instead of switch
* Moved `vm.Transfer` to `core` package and changed execution to call
  `env.Transfer` instead of `core.Transfer` directly.
* Byte code VM now shares the same code as the JITVM
* Renamed Context to Contract
* Changed initialiser of state transition & unexported methods
* Removed the Execution object and refactor `Call`, `CallCode` &
  `Create` in to their own functions instead of being methods.
* Removed the hard dep on the state for the VM. The VM now
  depends on a Database interface returned by the environment. In the
  process the core now depends less on the statedb by usage of the env
* Moved `Log` from package `core/state` to package `core/vm`.

* Renamed ChainManager to BlockChain
* Checkpointing is no longer required and never really properly worked
when the state was corrupted.

core, core/vm: refactor

Due to a rebase this probably got overlooked / ignored. This fixes the
issue of a block insertion never writing the last block.

core: fixed head write on block insertion

cmd/geth: dev version number

core: fix ethereum#1848, block receipts db entry for the genesis too

console/history respect datadir

crypto: correct sig validation, add missing unit tests of exported functions

core, core/vm, cmd/evm: remove redundant balance check

Argument parsing can lead to panic in rpc channel

There are a bunch of changes required to make this work:

- in miner: allow unregistering agents, fix RemoteAgent.Stop
- in eth/filters: make FilterSystem.Stop not crash
- in rpc/comms: move listen loop to platform-independent code

Fixes ethereum#1930. I ran the shell loop there for a few minutes and didn't see
any changes in the memory profile.

Fix for xeth OOM issue

Godeps: upgrade github.com/huin/goupnp

cmd/geth, cmd/utils, eth: group CLI flags by purpose

eth: added new testnet peers

This PR fixes an issue where the remote worker was stopped twice and not
properly handled. This adds a synchronised running check to the start
and stop methods preventing closing of a channel more than once.

miner: synchronise start / stop

Conflicts:
	VERSION
	cmd/geth/main.go

…se-1.3.1

Conflicts:
	Godeps/Godeps.json
	Godeps/_workspace/src/github.com/expanse-project/ethash/ethash_test.go
	Makefile
	VERSION
	cmd/gexp/blocktestcmd.go
	cmd/gexp/js.go
	cmd/gexp/js_test.go
	cmd/gexp/main.go
	cmd/utils/cmd.go
	cmd/utils/flags.go
	common/natspec/natspec.go
	common/natspec/natspec_e2e_test.go
	common/natspec/natspec_e2e_test.go.orig
	common/path.go
	common/registrar/registrar.go
	core/block_processor.go
	core/block_processor_test.go
	core/chain_manager.go
	core/chain_manager_test.go
	core/chain_util_test.go
	core/events.go
	core/execution.go
	core/filter.go
	core/state/errors.go
	core/state/statedb.go
	core/state_transition.go
	core/transaction_util.go
	core/types/bloom9.go
	core/types/common.go
	core/types/derive_sha.go
	core/types/receipt.go
	core/vm/common.go
	core/vm/environment.go
	core/vm/instructions.go
	core/vm/jit.go
	core/vm/jit_test.go
	core/vm/vm.go
	docker/Dockerfile
	docker/supervisord.conf
	eth/downloader/modes.go
	event/filter/eth_filter.go
	exp/backend.go
	exp/downloader/downloader.go
	exp/downloader/downloader_test.go
	exp/downloader/peer.go
	exp/downloader/queue.go
	exp/gasprice.go
	exp/handler.go
	exp/sync.go
	miner/worker.go
	rpc/api/admin.go
	rpc/api/debug.go
	rpc/api/eth.go
	rpc/api/eth_args.go
	rpc/api/miner.go
	rpc/api/personal.go
	rpc/comms/ipc.go
	rpc/comms/ipc_unix.go
	rpc/comms/ipc_windows.go
	tests/block_test_util.go
	tests/files/BlockchainTests/bcUncleTest.json
	trie/cache.go
	trie/fullnode.go
	trie/hashnode.go
	trie/secure_trie.go
	trie/shortnode.go
	trie/trie.go
	trie/trie_test.go
	trie/valuenode.go
	xeth/xeth.go