fix a bug in the compress_multi_entry_hdr() function

reduce the max golomb_par (cmp_par) because the entity field has 16 bits
split get_max_spill() function in 2 for RDCU cmp_rdcu_max_spill() and ICU cmp_icu_max_spill()
fix some typos
refactoring pad_bitstream() and cmp_data_to_big_endian() configure_encoder_setup() functions
refactoring RAW compression
update tests