* Bump codec

* Fix tests

* finalization for in_mem

* fetch last finalized block

* pruning: use canonical term instead of final

* finalize blocks in full node

* begin to port light client DB

* add tree-route

* keep number index consistent in full nodes

* fix tests

* disable cache and finish porting light client

* add AsMut to system module

* final leaf is always best

* fix all tests

* Fix comment and trace

* removed unused Into call

* add comment on behavior of `finalize_block`

* Initial stuff

* Treasury now mints based on lowest staked.

* Tests build

* Fix tests

* Fix hashes

* Fix tests & grumble

* Address grumbles

* Fix hash

* Initial groundwork

* A mess.

* Integrate

* Fix tests

* Unit tests

* Tests for unchecked_extrisnic

* fix tab

* Improve binary format.

* fix tests

* Rename extrinsic-pool -> transaction-pool

Closes #770

* Implement unimplemented.

* typo

* Move module metadata from json string to custom metadata

* Revisit the metadata structures

1. Move the structures into the metadata crate.
2. Switch to using Cow/MaybeOwnedArray to support Encode/Decode

* Adapt to new metadata structures

* Convert event json metadata to new metadata structures

* Convert storage json metadata to new metadata structures

* Convert runtime metadata from json to new metadata structs

* Implements new metadata structures in client and runtime

* Fixes errors on `no_std`

* Fixes errors after rebasing master

* Do not use `Cow` anymore in metadata

Also replace `String` with our own type definition `StringBuf`.
This fixes compilation on `no_std`.

* Wrap `RuntimeMetadata` in `RuntimeMetadataVersioned` to support versioning

* Move metadata into `srml` and make core unaware of the implementation

* Fixes compilation of sandbox tests

* Make `impl_outer_log!` scope independent

* Fix error handling in sandboxing/contracts modules

* Add some docs.

* Add some tests.

* grammar

* Implement codec for U256

* Use little endian and add tests

* Extract well known keys into a single place

* Fixes.

* changes_trie

* changs_trie: continue

* changes_trie: adding tests

* fixed TODO

* removed obsolete ExtrinsicChanges

* encodable ChangesTrieConfiguration

* removed polkadot fle

* fixed grumbles

* ext_storage_changes_root returns u32

* moved changes trie root to digest

* removed commented code

* read storage values from native code

* fixed grumbles

* fixed grumbles

* missing comma

* First effort

* API versioning

* Introduce validate_transaction

* Introduce the API plus fixes.

* Docs

* Typo

* Add longevity parameter to transaction validity info.

* Telemetry Refactor

* Cleanup

* Sleep after clearing Sender on error

* Make `system` module renamable in `impl_outer_event!`

* Implement `construct_runtime!` macro

This macro generates code for calling all the common `impl_outer_*` macros.

* Add documentation

* Fixes wrong declaration of `contract`

* Update dependencies to work on `no_std`

* One more `Cargo.lock` update

* Address comments

* Not use extern

* Update Cargo.lock

* WIP

* Direct return of output data.

* Docs and renamings.

* Add get_storage test.

* Overwrite the scratch buffer.

* Add --locked to the cargo build

* Remove trailing spaces

* Update Cargo.lock

* treasury: use 'mutate' and 'retain' to avoid creating a new vec

* treasury: check the underflow case

* Fixed spelling and grammar for clarity

* Update README.adoc

* Three comma club

* gramma grammma grammar

* Update README.adoc

* Remove commas

Corrected the commas.

Consider the sentences:

- "Energy-saving light bulbs which are cheap make for a sensible investment"
- "Energy-saving light bulbs, which are cheap, make for a sensible investment"

They are different. The first one is intimating that energy-saving light bulbs come in many prices and it's only the cheap ones which are a good investment. The second implies that all energy-saving light bulbs are generally cheap and they, regardless of price, make for a good investment.

The commas added (which I just removed) switched the meaning, incorrectly, from one to the other.

* bugfix: balances::transfer for new_account

issue:#722
would_create flag should depend on dest, not origin.
change 
```rust
let would_create = from_balance.is_zero();
```
to 
```rust
    let to_balance = Self::free_balance(&dest); 
    let would_create = to_balance.is_zero(); 
```
in the other hand, provide `fn new_test_ext2()` and let `transfer_fee=10`, `creation_fee=50` for test case

* Update lib.rs

* Update tests.rs

* Make `impl_outer_origin!` support generic `Origin`s (#732)

* Make `impl_outer_origin!` support generic `Origin`s

* Support empty outer origin

* Contracts: fix transfer function. (#733)

* Remove dependency on the parity repo (#734)

* Fix test

* Anothe fix

* Remove redundant code and merge rest into rt-std

* Update lib.rs

* Make `impl_outer_origin!` support generic `Origin`s

* Support empty outer origin

* add a python script to show the dependencies

* add the header line and modify the mod

* Improve and simplify `decl_event!`

- RawEvent is not required anymore to be written in the defintion
- Events with and without parameters are now supported everywhere

* Make `decl_event!` more flexible with the automatic naming of generic parameters

The macro will now automatically derive the name of a generic parameter
from the trait type name, if no explicit name is given.

`where Balance = <T as Trait>::Balance` can be simplified to
`where <T as Trait>::Balance`.

* Adapts to latest refactoring changes

* normalize decl_storage

* dispatch the function call

* add test case

* fix the root case

* add system

* fix the typo in unit test

* fix the doc generation for decl_module

* fix the unit test due to the interface change