* Added composer config, added IO/error tests using phpunit
* Added ApiGen doc comments
* Added test to ensure last_error is not set from loading up the CRT
* Added php7 library skeleton
* Re-worked Makefile.frag to use paths correctly
* Added gitignore for lib
* clang-format
* Remove symlinked api.h
* Copy api.h into lib/ as part of build
* Added awscrt_version() and test for it
* Added builder.json for CI
* Added github actions
* Added format-check.sh
* Force php5.6 on ubuntu
* Updated submodules