Release 0.8.0

• Update CocoaPods & Carthage for 0.8.0 release (#370) - Michael Rebello (8b064bd)
• Add ClientNetworkMonitor for tracking network changes (#387) - Michael Rebello (3b3c5c5)
• First pass implementation of NIO client (#357) - George Barnett (97ff923)
• Clean up gRPC.swift (#386) - Michael Rebello (ee0f374)
• Add ability to manually shut down channels (#384) - Michael Rebello (930440a)
• Update releasing instructions (#383) - Michael Rebello (f5c0d63)
• Comments/cleanup to Package.swift. (#371) - Daniel Alm (ba335b2)
• Refactor channel connectivity to avoid multiple spin loops (#380) - Michael Rebello (10aff09)
• Improve error handling in NIO server. (#364) - George Barnett (158c4ef)
• Fix channel credentials memory leak in shims (#369) - Kevin Sweeney (587218a)
• Make ConnectivityObserver class final (#375) - Michael Rebello (5f24269)
• Store the root certificates as a multi-line string literal. (#372) - Daniel Alm (ac3e175)
• Run ChannelCrashTests on Linux/CI (#379) - Michael Rebello (b899a30)
• Move ConnectivityState to new file & update initializer (#376) - Michael Rebello (9dff24d)
• Merge pull request #350 from sergiocampama/http1 - Tim Burks (ac1939e)
• Adds Echo Web example with functional prototype - Sergio Campama (86748a7)
• Add HTTP1 Tests for GRPCSwiftNIO - Sergio Campama (eee57da)
• Add gRPC Web support. - Sergio Campama (24c8e5d)
• Proposal to fix #362. (#363) - Alexey Gordeev (0195dfd)
• Allow client to specify metadata per call (#356) - Taeho Kim (3cd505a)
• Update SwiftProtobuf to 1.3.1 (#367) - Michael Rebello (96bf49e)
• Improve memory management in Channel (#368) - Kevin Sweeney (fcb8ab3)
• XCode 10.1 + Carthage support (#360) - Dmitry Malakhov (99d3834)
• Upgrade swift-nio to 1.12 - George Barnett (a43337c)
• Allow "FileNaming" option to be set via CLI - George Barnett (78c5fed)
• Bump podspec to 0.7.0 - Michael Rebello (6928fb2)