src: eeprom.c: eeprom_put_block(): Fix Doxygen comment block
src: color: Rename Hue_t to color_hue_t
TODO: Update item regarding memory management

Using malloc() in an embedded environment is probably a bad idea and the
current code base does not require it. Therefore we should try to avoid
the dependency, which would not only increase code size, but would also
introduce problems coming along with the fragmentation of memory.