dev
cmake: Add scripts/configs to allow cmake build/test
Harden TDNF build by enforcing various GCC build flags
Added tdnf-automatic
Replace existing use of libxml2 library with expat library.
plugin headers and initial repogpgcheck plugin implementation - plugin event map for guidance to event items - plugin events init, repo, repomd - tests for plugin conf - tests with a repomd sign and verify via plugin
Add cmake check for openssl-devel (#139)