cmd/faucet: remove Google+ mention from web assets too

* core, eth, trie: bloom filter for trie node dedup during fast sync

* eth/downloader, trie: address review comments

* core, ethdb, trie: restart fast-sync bloom construction now and again

* eth/downloader: initialize fast sync bloom on startup

* eth: reenable eth/62 until we properly remove it

* les, light: implement ODR transaction lookup by hash

* les: delete useless file

* internal/ethapi: always use backend to find transaction

* les, eth, internal/ethapi: renamed GetCanonicalTransaction to GetTransaction

* light: add canonical header verification to GetTransaction

p2p/discover: fix nil-dereference due to race

* move error variable to error.go

* Update error.go

Edit "Genesis" to "genesis"

* core: fix import errors on clique crashes + empty blocks

* cosensus/clique, core: add test for the mirrored state issue

* core: address todo question wrt log count

* core: raise a louder warning for non-clique known blocks

swarm v0.4-rc1

swarm/storage: remove traces for put/get/set (#1389)

* swarm/storage: remove traces for put/get/set

* swarm/storage: remove Has traces

swarm/storage/localstore: add gc metrics, disable flaky test

swarm/storage/localstore: fix broken metric (#1373)

p2p/protocols: count different messages (#1374)

cmd/swarm: disable snapshot create test due to constant flakes (#1376)

swarm/network: remove redundant goroutine (#1377)

swarm/network: add want delay timer to syncing (#1367)

swarm/network: synchronise peer.close() (#1369)

swarm/api: integrate tags to count chunks being split and stored
swarm/api/http: integrate tags in middleware for HTTP `POST` calls and assert chunks being calculated and counted correctly
swarm: remove deprecated and unused code, add swarm hash to DoneSplit signature, remove calls to the api client from the http package

* swarm/chunk: add tags backend to chunk package

swarm/network: measure how many chunks a node delivers (#1358)

* swarm/shed: remove metrics fields from DB struct

* swarm/schunk: add String methods to modes

* swarm/storage/localstore: add metrics and traces

* swarm/chunk: unknown modes without spaces in String methods

* swarm/storage/localstore: remove bin number from pull subscription metrics

* swarm/storage/localstore: add resetting time metrics and code improvements

cmd/swarm/swarm-smoke: improve smoke tests (#1337)

swarm/network: remove dead code (#1339)

swarm/network: remove FetchStore and SyncChunkStore in favor of NetStore (#1342)

 cmd/faucet: embed git commit hash/date, disable Google+

* add-date-to unstable

* fields-insteadof-split

* internal/build: support building with missing git

* docker: add git history back to support commit date in version

* internal/build: use PR commits hashes for PR builds

* core: import known blocks if they can be inserted as canonical blocks

* core: insert knowns blocks

* core: remove useless

* core: doesn't process head block in reorg function

eth/downloader: fix header delays during chain dedup

* accounts: add note about backing up the keystore

* cmd, accounts: move the printout to accountCreate

* internal, signer: add info when new account is created via rpc

* cmd, internal, signer: split logs

* cmd/geth: make account new output a bit more verbose

* core: add tests for canonicality confusion

* core: delete stale future canon number mappings during reorg to shorter+heavier chain

* trie: fix merkle proof

* trie: use hasher instead of allocate keccack256 every time

* trie: add comments