Minimal switch of substrate-node to GRANDPA /Aura (#1128)

* add beginnings of SRML grandpa library

* get srml-grandpa compiling

* tests for srml-grandpa

* add optional session integration to grandpa SRML

* start integration into node runtime

* Allow extracting pending change from header digest

* Make it compile on wasm

* make tests compile again

* Move Authority Key fetching into service, simplify service factory construction

* Generalize Authority Consensus Setup system

* Add Authority Setup Docs

* Allow CLI params to be extensible

 - move params to structopts
 - split parsing and default command execution
 - add custom config to node
 - extended parsing of custom config
 - extending params via structop's flatten

* Minor fixes on cli extension params:
 - added docs
 - re-add actual app name, rather than node-name
 - make strategy and subcommand optional

* better cli params

* synchronize GRANDPA and normal node authorities

* Implement grandpa::network for gossip consensus

* run_grandpa in Node

* Fix missed merge error

* Integrate grandpa import queue

* more specific type def

* link up linkhalf and import block

* make grandpa future send

* get compiling

* Fix new params convention and license header

* get it running

* rebuild node runtime WASM

* change logging level

* Update node/cli/src/params.rs

Co-Authored-By: rphmeier <rphmeier@gmail.com>

* Update node/cli/src/params.rs

Co-Authored-By: rphmeier <rphmeier@gmail.com>

* Update node/cli/src/lib.rs

Co-Authored-By: rphmeier <rphmeier@gmail.com>

* Update node/runtime/src/lib.rs

Co-Authored-By: rphmeier <rphmeier@gmail.com>

* Update node/cli/src/lib.rs

Co-Authored-By: rphmeier <rphmeier@gmail.com>

* Clean up and Fixme for mutable config

* Move GrandpaService Integration into grandpa, feature gated but on per default

* Fixing grandpa runtime module test

* Update wasm runtime hashes for tests

* GRANDPA: use post-header hash when logging scheduled changes

* add an extra bit of logging to authorities

* fixing missing constrain

* remove old code

* move `NewAuthorities` to an event in srml-grandpa

* fix node-executor tests to use grandpa log

* Remove GossipConsensus from tests, use newly provided sync-feature, fixes tests

* Update to latest wasm runtimes

* address grumbles

* address grumbles

* only derive deserialize when using std

* Clean up use of Deserialize

substrate/node/cli/doc/shell-completion.adoc

@@ -0,0 +1,41 @@
+
+== Shell completion
+
+The Substrate cli command supports shell auto-completion. For this to work, you will need to run the completion script matching you build and system.
+
+Assuming you built a release version using `cargo build --release` and use `bash` run the following:
+
+[source, shell]
+source target/release/completion-scripts/substrate.bash
+
+You can find completion scripts for:
+- bash
+- fish
+- zsh
+- elvish
+- powershell
+
+To make this change persistent, you can proceed as follow:
+
+.First install
+
+[source, shell]
+----
+COMPL_DIR=$HOME/.completion
+mkdir -p $COMPL_DIR
+cp -f target/release/completion-scripts/substrate.bash $COMPL_DIR/
+echo "source $COMPL_DIR/substrate.bash" >> $HOME/.bash_profile
+source $HOME/.bash_profile
+----
+
+.Update
+
+When you build a new version of Substrate, the following will ensure you auto-completion script matches the current binary:
+
+[source, shell]
+----
+COMPL_DIR=$HOME/.completion
+mkdir -p $COMPL_DIR
+cp -f target/release/completion-scripts/substrate.bash $COMPL_DIR/
+source $HOME/.bash_profile
+----