* WIP move errors, pod_account and state account to own crates
* Sort out dependencies, fix broken code and tests
Remove botched ethcore-error crate
* remove template line
* fix review feedback
* Remove test-only AccountDBMut::new
* Extract AccountDB to account-db
* Move Substate to state-account – wip
* Add lib.rs
* cleanup
* test failure
* test failure 2
* third time's the charm
* Add factories crate
* Use new factories crate
* Use factories crate
* Extract trace
* Fix tests
* Sort out parity-util-mem and parking_lot
* cleanup
* WIP port over the rest of state from ethcore
* Collect all impls for Machine
* some notes
* Rename pod-account to pod
* Move PodState to pod crate
* Use PodState from pod crate
* Fix use clause for json tests
* Sort out evmbin
* Add missing code and use PodState
* Move code that depends on Machine and Executive to own module
* Sort out cloning errors, fix ethcore to use new state crate
* Do without funky From impls
* Fix ethcore tests
* Fixes around the project to use new state crate
* Add back the more specific impls of StateOrBlock From conversions
* Move execute to freestanding function and remove it from trait
Sort out the error handling in executive_state by moving the result types from state to ethcore
Undo the verbose code added to work around the StateOrBlock From conversions
* cleanup
* Fix "error: enum variants on type aliases are experimental"
* Bring back the state tests
Fix whitespace
* remove ethcore/state/mod.rs
* cleanup
* cleanup
* Cleanup state-account errors
* Fix more todos
Add module docs
* Add error.rs
* Fixup Cargo.lock
* Smaller ethcore API is fine
* Add `to-pod-full` feature to state-account
Fix evmbin
* Fix a few more test failures
* Fix RPC test build
* Baptize the new trait
* Remove resolved TODOs
* Rename state-account to account-state
* Do not re-export the trace crate
* Don't export state_db from ethcore
* Let private-tx use StateDB. :(
* Remove ethcore/src/pod_state.rs
* Inner type does not need to be pub/pub(crate)
* optimise imports
* Revert "Inner type does not need to be pub/pub(crate)"
This reverts commit 2f839f8a0f72f71334da64620f57e6dd6039f06b.
* Move DatabaseExtras to ethcore-blockchain
* Add database_extra module to ethcore-blockchain
* Remove to-pod-full feature
* cosmetics
* New crate: state-db
* Add new crate
* Move PreverifiedBlock and BlockError to types
* Sort out the merge
* Add missing `license` meta data keys
* wip
* wip client-traits
* merge conflict
* verification crate type checks
* Move impls for CommonParams to common_types
Fix misc stuff in ethcore
* Fix tests
* Implement VerifyingEngine for all engines except Ethash
Temporarily sort out error handling
Move more types to common_types
* Split Engine in two and move code around
* cleanup
* verification: don't rexport common_types
* Use error from common_types
* Consolidate error types
* VerifyingEngine use Errors from common_types
* verification: Use error type from common_types
* SnapshotError moved to common_types
* Move more code from Engne to VerifyingEngine
Add a VerifyingClient trait: BlockInfo + CallContract
Whitespace
* Add MAX_UNCLE_AGE const
* Port over remaining code from ethcore/verification
* Use errors from common_types
* Fix the confusing "io" naming
* Move more types into common_types
* Add todos
* Experiment with Engine trait outside ethcore
* Hook up types from common_types in ethcore
Don't use verification crate
Don't use client-traits crate
* Revert to impl Engine for Arc<Ethash> and add note to explain why
Revert moving ClientIoMessage to common_types
Fix build
* Remove ClientIoMessage from common_types
* Cleanup
* More cleanup
* Sort error handling changes in the rest of parity
* Remove unused code
* Remove WIP types
* Cleanup todos not tackled here
* remove cruft
* Fix some whitespace and a merge error
* ethcore tests
* test failures
* Restore Engine impls to master to make review a bit easier
* cleanup
* whitespace
* applied review suggestions
* types does not depend on rustc-hex
* ethash engine moved to engine module
* applied review suggestion
* Update `add_license` script
* run script
* add `remove duplicate lines script` and run it
* Revert changes `English spaces`
* strip whitespaces
* Revert `GPL` in files with `apache/mit license`
* don't append `gpl license` in files with other lic
* Don't append `gpl header` in files with other lic.
* re-ran script
* include c and cpp files too
* remove duplicate header
* rebase nit
