* EVM informant. Slow transactions tracking

* Additional feature for tests

* bloom crate link

* database layout and outdated tests

* state db alterations

* v10 migration run

* using arc

* bloom migration

* migration fixes and mess

* fix tests

* Actually enable fat db, and do RPCs for it.

* Implement HashDB traits for AccountDB.

* user defaults

* finished user defaults

* user defaults are network-dependent

* added tests for newly added functions, logger is initialized first

* dir cleanup in progress

* user_file is placed next to snapshots

* fixing requested change

* Jumptable cache

* Updated registrar address

* Detecting DELEGATE_CALL in JIT

* Fixing evmjit tests

* Prioritizing re-imported transactions

* Fixing compilation on beta

* Revert #2172, pretty much.

* Tidy up whitespace.

[ci:skip]

* Force CI.

* Fix the traceAddress field in transaction traces.

* Add test

* Fix warning.

* Fix test

* Additional fix.

* Fix tests content.

* Removing extras data from retracted blocks.

* Adding a test case

* Add support for Expanse.

* Fix build.

* Refactor to be able to alter the eth subprotocol name

* Fix JSON.

* Support exp hardfork.

* Fix exp json again.

* Fixed test

* Fix tests.

* allow specifying cache sizes for specific columns

* initialize client with correct cache size

* set cache size in client service

* default cache size for unspecified columns

* fix comment

* fix column selection logic

* fix migrations module

* State cache

* Reduced copying data between caches

Whitespace and optional symbols

* Reduced copying data between caches

Whitespace and optional symbols

* Set a limit on storage cache

* Style and docs

* move block queue to own module, a couple readability changes

* make block queue generic over verifiable data

also fixes heap size calculation

* make block queue into a more generic verification queue

* some module reoganization

* implement header queue

* clean up verification error messages

* Reorder transaction_by_hash to favour canon search

* Fix build.

* Slightly cleaner function.

* Fix test.

* user defaults

* finished user defaults

* user defaults are network-dependent

* added tests for newly added functions, logger is initialized first

* dir cleanup in progress

* user_file is placed next to snapshots

Conflicts:
	ethcore/src/miner/transaction_queue.rs

Conflicts:
	ethcore/src/miner/transaction_queue.rs

* Separate path for code size

* Actually use it for EVM

* add extcodesize to TestExt

Closes #2213
Omit transaction and receipt roots from abridged block.
No longer use RLP compression.

Make ordered_trie_root generic over an iterator to save an allocation.

Breaks snapshot format backwards compatibility (with other 1.4 snapshots -- it's already been broken with 1.3).

Documentation will need updating