Collator for the "adder" (formerly basic-add) parachain and various small fixes (#438)

* update basic_add wasm

* wasm feature and collator feature

* move test parachains around a little

* fix wasm build for basic_add

* move basic_add to adder, introduce README

* minimal basic_add collator

* ensure collator messages are sent in the right order

* more logging

* route consensus statements to all peers

* minor bugfixes for parachains

* genesis builder accounts for parachain heads

* fix parachains tests

* targets for txpool

* tweak runtime + collator

* fix version in adder-collator

* consistency for overflowing

* adjust comment

* fix stable test run

* remove dummy registration test

* final grumbles

substrate/Cargo.lock

@@ -1,3 +1,26 @@
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "polkadot-parachain 0.1.0",
+ "tiny-keccak 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "adder-collator"
+version = "0.1.0"
+dependencies = [
+ "adder 0.1.0",
+ "ctrlc 1.1.1 (git+https://github.com/paritytech/rust-ctrlc.git)",
+ "ed25519 0.1.0",
+ "exit-future 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "polkadot-collator 0.1.0",
+ "polkadot-parachain 0.1.0",
+ "polkadot-primitives 0.1.0",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "0.6.4"