core: added CheckNonce() to Message interface

eth/downloader: return invalid chain (peer drop) on import fails

core: solve a remote-import/local-mine data race

README: expand with "Running Geth" section

containers/docker/master-alpine: drop gmp dependency

eth: disable eth/61 to prepare for more elaborate fork sync algos

README: fix build->built typo

(cherry picked from commit e271fd57132763f39c6993a35e6c063aac3af4f1)

cmd, common, console, eth, release: drop redundant "full"s

eth: separate common and full node-specific API and backend service

cmd/geth: fix the import error message

cmd/geth: include the error message on import failure

Revert faulty DAO soft-fork

This reverts commit 7a5b571c.

This reverts commit c4de2893.

This reverts commit ba784bdf.

This reverts commit 1e3a7d4f.

core: update the DAO soft fork proposal to the final block

DAO soft-fork

web3ext: Remove old natspec Admin_JS stubs

This stops them from showing up on the javascript console.

build: add ci.go, use it everywhere

The new build script, ci.go, replaces some of the older shell scripts.
ci.go can compile go-ethereum, run the tests, create release archives
and debian source packages.

This implements a generic approach to enabling soft forks by allowing
anyone to put in hashes of contracts that should not be interacted from.
This will help "The DAO" in their endevour to stop any whithdrawals from
any DAO contract by convincing the mining community to accept their code
hash.

README, core, rpc: Fix typos