Add cereal cmake

# CMake module for find_package(CEREAL)

# Finds include directory and all applicable libraries

# This sets the following variables:

# CEREAL_FOUND - True if Cereal was found.

# CEREAL_INCLUDE_DIRS - Directories containing the Cereal include files.

# CEREAL_DEFINITIONS - Compiler flags for Cereal.

find_path(CEREAL_INCLUDE_DIR cereal

        HINTS "${CEREAL_ROOT}/include" "$ENV{CEREAL_ROOT}/include" "/usr/include" "$ENV{PROGRAMFILES}/cereal/include" "cereal/include")

set(CEREAL_INCLUDE_DIRS ${CEREAL_INCLUDE_DIR})

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(Cereal DEFAULT_MSG CEREAL_INCLUDE_DIR)

mark_as_advanced(CEREAL_INCLUDE_DIR)

if(CEREAL_FOUND)

    message(STATUS "Cereal found (include: ${CEREAL_INCLUDE_DIRS})")

endif(CEREAL_FOUND)