core/state, trie: don't leak database writes before commit

cmd, eth, rpc: fix some RPC issues with pending blocks

core/vm, rpc/api: added debug_replayTransaction RPC call

account/abi: implements event parsing

CONTRIBUTING: Added a feature section

miner: register newly created remote agent in the API

Implementation of basic event parsing and its input types. This
separates methods and events and fixes an issue with go type parsing and
validation.

Integrated code review suggestions

Integrated last review comments

core, eth, rpc/api: rpc method to inspect the txpool queue

p2p/discover: fix Windows-specific issue for larger-than-buffer packets

containers/docker/master-alpine: add the legacy gmp lib back for now

containers: regroup and add Alpine images (31 MB)

internal/debug: APIs for profiling and tracing

core, core/types, miner: fix transaction nonce-price combo sort

The debug package provides an RPC wrapper for glog settings and the
debugging facilities of the Go runtime. They can be triggered through
both command line flags and the IPC listener.

The "result" field of JSON-RPC 2.0 responses was omitted
if the result was nil, causing exceptions in web3.js.

Rpc2 console

logger/glog: improve vmodule

On Windows, UDPConn.ReadFrom returns an error for packets larger
than the receive buffer. The error is not marked temporary, causing
our loop to exit when the first oversized packet arrived. The fix
is to treat this particular error as temporary.

Fixes: #1579, #2087
Updates: #2082

separate and optimize Dockerfile for master and develop

This change allows setting the verbosity for directory prefixes
using the syntax:

    --vmodule=eth/=6

core/vm: resolve circular dependency to debug vm storage

console: add admin.sleep and admin.sleepBlocks

Nodeinfo format Genesis and Header