Fixed bugs in TLS and MQTT

TLS API updates (#11)

* Updated to latest aws-c-common, aws-c-io

* API updates for TLS API changes in aws-c-io

* added .idea (clion) to gitignore

* .DS_Store added to gitignore

* Forced commit hashes on aws-c-common and aws-c-io to hopefully appease CI

* No pkcs12 on non-apple

* clang-format

* Update to aws-c-common v0.3.4

* Respect the configured allocator

* Updated to aws-c-mqtt v0.2.2

* clang-format

* Updated to aws-c-io v0.2.3

RHEL path CMake fixes, updates to callback definitions.

v.0.1.1

Added support for RHEL variant lib paths, general install improvement…

Initial release for Iot SDKs

README updates. (#4)

* README updates.