* Add missing `As` imports.
* Adds new API traits that will be used by the client and runtime
* Switch consensus to new API's
* Switches transaction-pool to new API's
* Move runtime api stuff into its own crate
* Adds `impl_apis!` macro for implementing the new API traits
* Make `metadata` return directly a blob
* Runtime replace `impl_stubs!` with `impl_apis!`
* Switches to none feature based approach for declaring the different API traits
* Fixes compilation error
* Fixes errors
* Make the `decl_apis!` trait usable from the outside
* Make the `test-client` use the new API traits
* Remove last `impl_stubs!` bits and move some of them into wasm executor for tests
* A little bit more documentation
* 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`
* move `tree_route` to client common
* tree_route tests
* return slices in TreeRoute
* apply finality up to parent
* add `finalize_block` call
* adjust formatting
* finality notifications and add last finalized block to chain info
* exhaustive match and comments
* fix sync tests by using non-instant finality
* 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