polkadot v0.4.4 (paritytech#252)

polkadot v0.4.3: update to latest substrate v1.0 (paritytech#209)

Update to `v0.4.2` (paritytech#208)

build runtime wasm

Update Alexander to Substrate 1.0 (paritytech#204)

* Update Alexander to latest substrate master

* Bump runtime verison

* Update to latest substrate changes

* Update substrate again

* Update to substrate master

* Bump to `v0.4.0`

* Update runtime

polkadot v0.3.21 (paritytech#196)

bump spec version (paritytech#191)

update to substrate master: bump version to v0.3.19 (paritytech#188)

* update to substrate master: bump version to v0.3.19

libp2p network improvements

* network: replace NodeIndex with PeerId

* network: fix tests

[v0.3] Update to substrate master (paritytech#183)

* update to latest substrate master

* bump version to 0.3.18

* update to latest substrate master

* bump spec version

* update runtime wasm blobs

* remove current_offline_slash from chain spec

bump version to v0.3.17