* BlockAuthorityId convenience type
* Rename AuthorityId -> Ed25519AuthorityId to make it more precise
* Generalize AuthorityId up to substrate-client
* Fix in client-db
* rename: BlockAuthorityId -> AuthorityIdFor
* typo: should be digest item
* Fix test-runtime authorityId mismatch
One states that AuthorityId is u64 while the other states that it's Ed25519AuthorityId.
* Fix more u64 - Ed25519AuthorityId mismatch
* Fix compile of most of the srml modules
* Continue to pin aura and grandpa with ed25519 and fix compile
* Add MaybeHash trait
* Fix node-runtime compile
* Fix network tests
* 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