Simple C program built by CMake

• src/program.c - module with main() function, meant to be entry point of an executable
• src/module.c - utility module, meant to provide interfaces for main module
• test/test_*.c[cmocka branch] - test modules for modules in src/ directory

• cmake branch - basic project with no fancy features - just sources
• cmocka branch - same as cmake plus unit tests and mocking with help of cmocka framework
• getopt branch - same as cmake plus CLI interface using getopt() function
• install branch - same as cmake plus allows to install program via make install