* Groundwork for basic VM tracing.

* RPC endpoint for VM tracing and ser/de types ready.

* Create VMTracer trait.

* Rearchitected VM tracing to reflect existing tracing.

Should more or less work now.

* Integrated VM tracing into JSONRPC.

* Fix ethcore module tests.

* Add tests for VM tracing.

* Fix consensus test code.

* Fix mock tests.

* Added VM trace information for post-execution stuff.

* Fix max-value calls and add "creates" field to getTransaction.

* Tests for VM tracing.

* Don't implement the trait with unimplemented.

* Remove invlaid comment.

* Fix tests.

* devtools extensions

* some doc effort

* Networking refactoring

* Make sure the same socket is reused

* Safer atomic ordering

* Replaced eq with ==

Client & Miner refactoring

* update readme

[ci skip]

* minor fixes

* mention dapps server.

[ci skip]

* Splitting methods requiring signing into separate trait

* Single place where RPC apis are created.

* Separating eth_filter

* Separating eth_signing

* Stubs for Personal Signer methods

* Test for EthSigningQueueClient

* TransactionConfirmation API

* Exposing PersonalSigner API

* Defining ApiSets dependent on context

* Removing types

* Fixing default impl

* Fixing un-mocked tests

* Update signing_queue.rs

[ci skip]

* Removing unused import [ci skip]

Using ordered hashmap to keep the order of dapps on home screen

Disabling `ethcore` by default, adding x-frame-options header to dapps.

transaction count verifier tests

expunge x! and xx! from the codebase