Update subscriber for v1.1.0

[DyrellC]

Here's the update showing the new function calls from the c bindings, showing how to manage the general error handling (all just logs for now). It also includes the updated channels.h. I've tested it and it worked, but there were still problems with the latency, so we'll have to discuss options on that front.

[tsconn23]

After incorporating changes and using the v1.1.0 .so that you and I built earlier this week, I am receiving the following error on this line.

{"timestamp":"2021-07-15T16:39:20Z","hostname":"ubuntu","application":"./alvarium-example","line-number":"publisher.go:198","log-level":"debug","message":"announcement response - { \"announcement_id\": \"32bc4e28380e08ed4923b515481b045a028662441e7f28c2da82d7b838cc784d0000000000000000:6936d4e499c982365578a582\" }"}
{"timestamp":"2021-07-15T16:39:20Z","hostname":"ubuntu","application":"./alvarium-example","line-number":"sdk.go:41","log-level":"error","message":"sub_receive_announce() returned error \nSTREAMS ERROR: Operation failed to execute properly"}

I notice in the PR there's no error checking here so I removed my error check to see if it would fall through and work but no luck.