Merge pull request libbitcoin#633 from thecodefactory/build-update

Regenerate build artifacts.

Various updates.

Add segregated witness and regtest, fixes.

Update for check-sequence-verify.

Fix tx-decode by eliminating payment address version.

Fix subscriptions, add watch-stealth and new languages.

Major new features and improved quality.

Fix tx-encode and certificate handling.

Update for p2p networking in libbitcoin.

Upgrade for libbitcon server and bip39.