Added SSL example, bug fixes and upgrade refactor

- Fixed a bug where the PeerConfiguration constructor ignored the protocolMode argument and always set the mode to active
- Changed the way UpgradeAsync works, it now requires that the peer be in Passive mode, simplifying the logic but potentially a breaking change
- Added SslUpgrader.CheckCertificateRevocation
- Added SslUpgrader.RemoteValidationCallback
- Added SslUpgrader.LocalSelectionCallback
- Added an SSL text-protocol example
- Moved to 0.6.0

Added .NET 4.6 and moved to 0.5.4

Updated packages and moved to 0.5.3

- Updated pipelines package from 4.5.2 to 4.5.3
- Moved to 0.5.3

Added subscription flush option

- Moved to 0.5.2
- In some cases you may call Subscribe on an active peer after frames have been received, for simplicitly you can now use the SubscriptionOptions.Flush option to cause any frames in the queue to be dequeued and sent to the observer

Improved server accept logic

- Added ProtocolServer.AcceptDelay, which introduces a variable delay between accepting new connections
- Added ProtocolServer.AcceptMode, allowing you to manually control the accepting of new connections
- Moved to 0.5.1

Moved to 0.5.0

- Actually moved project to 0.5.0

Filtering improvements

- Renamed ProtocolServer.ConnectionFilter to ProtocolServer.Filter
- Removed unused extension file
- Cleaned up connection filters
- Moved to 0.4.1

Various fixes and minor changes

- Moved to 0.4.0
- Added Example.Line
- Renamed ProtocolPeer.SendAsync(CancellationToken) to ProtocolPeer.FlushAsync(CancellationToken)
- Cleared up end of stream logic
- Fixed bug which would prevent peers fully disconnecting if a observer was subscribed

Fixed disconnects not being called correctly

- Moved to 0.3.3

Fixes for samples for new coder factory

- Moved to 0.3.2