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

Changed the version number of geth to 1.2.0 so that dev builds are now properly build (instead of master). Note to self; increase version number to 1.2.1 for our next actual release.

Dev mode enabled some debugging flags such as:

* VM debugging mode
* Simpler proof of work
* Whisper enabled by default
* Datadir to a tmp datadir
* Maxpeers set to 0
* Gas price of 0
* Random listen port

This reverts commit 5c949d3b.

PR #856 broke command line editing by wrapping stdout with a filter that
interprets ANSI escape sequences to fix colored printing on windows.
Implement the printer in Go instead so it can do its own
platform-dependent coloring.

As a nice side effect, the JS console is now noticeably more responsive
when printing results.

Fixes #1608
Fixes #1612

* changed stack and removed stack ptr. Let go decide on slice reuse.

Implemented canonical extra data according to
https://github.com/ethereum/wiki/wiki/Extra-Data

Package fdtrack logs statistics about open file descriptors.
This should help identify the source of #1549.

Added a --olympic flag which initialiser the olympic protocol settings

Genesis release. Closes #1402

Conflicts:
	cmd/geth/main.go

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

Implemented the --genesis flag thru which we can set a custom genesis
block, including the official Ethereum genesis block.

ParamsToAddress no longer aborts the process, it now returns an error
instead so that the caller can handle the error properly.