* Generalize BlockImport
- move ImportBlock, BlockOrigin, ImportResult into shared sr-primitives
- let Consensus provide and traits again
- update consensus traits to latest development
- implement traits on client::Client, test_client::TestClient
- update RHD to use the new import_block API
* Move ImportBlock into consensus-common
* Send import notification in aura tests
* Integrating aura into service
* Make Signatures more generic
* Aura Block Production with the given key
* run aura on the thread pool
* start at exact step start in aura
* Add needed wasm blob, in leiu of better solutions.
* Make API ids consistent with traits and bring upstream for sharing.
* Add decrease_free_balance to Balances module
* Encode `Metadata` once instead of two times
* Bitops include xor
* Upgrade key module.
* Default pages to somewhat bigger.
* Introduce upgrade key into node
* Add `Created` event
* General `decl_module` improvements
* Make `deposit_event` implementable by `decl_module!`
* Make `decl_module!` implement calls directly
* Regenerate the wasm file after master rebase
* Adds new `ProvideInherent` trait
Also implements the new trait for `srml/consensus` and `srml/timestamp`.
* Adds `impl_outer_inherent!` macro
* Reexport macros from `alloc`
* Introduce `RuntimeString` and fix `ProvideInherent` on `no_std`
* Replace `VersionString` with `RuntimeString`
* Improvements for `impl_outer_inherent!`
* Make `construct_runtime!` support `impl_outer_inherent!`
* Fixes after rebase
* Whitespace
* 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
* Remove unneeded script
* Rename Substrate Demo -> Substrate
* Rename demo -> node
* Build wasm from last rename.
* Merge ed25519 into substrate-primitives
* Minor tweak
* Rename substrate -> core
* Move substrate-runtime-support to core/runtime/support
* Rename/move substrate-runtime-version
* Move codec up a level
* Rename substrate-codec -> parity-codec
* Move environmental up a level
* Move pwasm-* up to top, ready for removal
* Remove requirement of s-r-support from s-r-primitives
* Move core/runtime/primitives into core/runtime-primitives
* Remove s-r-support dep from s-r-version
* Remove dep of s-r-support from bft
* Remove dep of s-r-support from node/consensus
* Sever all other core deps from s-r-support
* Forgot the no_std directive
* Rename non-SRML modules to sr-* to avoid match clashes
* Move runtime/* to srml/*
* Rename substrate-runtime-* -> srml-*
* Move srml to top-level
Wei Tang