Make PD and ACU talk to each other (secure and via both TCP and Serial)

[dxm007]

• Logger within Device class and the sample CardReader project
• IDisposable interface on IOsdpConnection interface and all classes that derive from it
• IOsdpServer interface which works with Serial AND TCP to be used by the device that is intended to open a listening side of a network connection and wait for the client to connect to it
• Fixed establishing secure channel between PD and ACU
• Added logging within Device class to help troublshoot stuff
• Make IOsdpConnection interface fully async so that the ability is there when it is needed (i.e. tcp) and implementation still has the option of being fully sync and simply returning Task.CompletedTask when not needed (i.e. serial)
  • Cleaned up all build warnings
  • Cleaned up runtime error/warning logs
  • Make Serial PD connection more resilient such that if it connects to a port that already has some data, the timeout won't cause entire PD to permanently fail, but rather it will handle the error and recreate serial comm port connection (will also handle any other transient comm error via same logic)