added clang-format file
added clang-format file

jbcoe/C_API_generation,FFIG/ffig,FFIG/ffig,jbcoe/C_API_generation,FFIG/ffig,jbcoe/C_API_generation,FFIG/ffig,jbcoe/C_API_generation,FFIG/ffig,FFIG/ffig,FFIG/ffig,FFIG/ffig