Update changelist for 2.1.0 final

Add 2.1 beta release notes

Update release notes for 2.0.0 final

Include protocol and vhost for proper HTTPS support in CDNClient.

Prepare project and notes for beta

Merge pull request SteamRE#465 from SteamRE/fix-reconnect-bug

Fix exception when reconnecting.

Merge pull request SteamRE#465 from SteamRE/fix-reconnect-bug

Fix exception when reconnecting.

Merge pull request SteamRE#461 from SteamRE/fix-ws-win7

Handle exception when creating connection.

Merge pull request SteamRE#441 from SteamRE/validation

Check arguments before attempting to use them

Fix exception sending WebSocket message.

Closes SteamRE#426.

Aldo added additional logging in case we get a websocket text message.