New configuration system

apps/enclave/cfg/enclave.cfg

apps/enclave/src/chk.cpp

apps/enclave/src/config.cpp

apps/enclave/src/config.hpp

apps/enclave/src/logger.cpp

apps/enclave/src/logger.hpp

apps/enclave/src/main.cpp

apps/enclave/src/platform.hpp

apps/enclave/src/random.cpp

apps/enclave/src/sam.cpp

apps/enclave/src/sam.hpp