Update release notes and version information for 2.2.0 release

Sync release notes

Add release notes and update URI for 2.2 beta 2

Add changelog and update release link for 2.2 beta

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.