params: reduce extra data to 32 bytes & target block time

core: fixed genesis write out to write only canon number

eth: set default miner extra to client name

core: 5 ether block reward

cmd/geth, core, eth: Version 1.0.0

ethdb, trie: removed RLE compression

core: check genesis block before writeout

cmd/util: lowered default gas price

Genesis release. Closes #1402

Conflicts:
	cmd/geth/main.go

web3: updated 0.9.1

cmd/core,xeth: removed unneeded states & added batch writes

all: license fixes

cmd, core, eth, ethdb: cache flag to allocate memory for db internal use

core: fix an RLP encoding data race due to deep struct copy

All code outside of cmd/ is licensed as LGPL. The headers
now reflect this by calling the whole work "the go-ethereum library".

crypto/curve.go is not our code and has its own license. This commit
excludes it in update-license.go and removes our GPL header.

accounts: fix data race when key is locked after the unlock timeout

Legalese updates

miner: fix current work data race

Fixed canary to require 2+ nonzero, not sum 2+

While here, also improve the docs and speed up the tests.
The tests used the scrypt keystore with ridiculous settins and took 20s
each.

xeth: fix #1485, data race in fiilter creation and event firing