Security hardening and protocol error JSON fixes

• adds a significant amount of error-checking and safety-hardening
• fixes the JSON bodies of several protocol error messages

CONNECT_ACK bugfix

• Fix bug where client "forgets" it received CONNECT_ACK (#60)

Fix possible deadlock from on_closed callback

Release lock before invoking callbacks (#55)

Issue: We were seeing deadlock if one stream was activated from within the on_closed() callback of another stream. This was because we used a lock to protect continuation_table AND the on_closed() callback was automatically invoked when an entry was removed.

Solution is to remove the automatic action when entry removed from table. Instead we invoke the on_closed() callback after the lock is released.

Fixed gcc newline warning

v0.2.5

Added newline (#53)

Fixed shared lib build configuration

v0.2.4

Fixed shared-lib builds (#51)

Fixed shared lib test configuration

v0.2.3

Added test helper to ensure symbol is exported (#50)

Tagged network tests as net tests

v0.2.2

Marked RPC tests as net tests (#49)

Event-stream rpc server and client. Event-stream channel handler. Added aws-c-io dependency and logging.

Event stream rpc full stack (#48)

* event-stream-rpc implementation and tests. Added aws-c-io dependency.

Update CMakeLists.txt to use aws-c-event-stream as a submodule of aws-crt-cpp

• Update CMakeLists.txt to use aws-c-event-stream as a submodule of aws-crt-cpp (#38)

Only call on_prelude() when prelude passed crc check

v0.1.4

Only call on_prelude() when prelude passed crc check and limitation c…