Translated 24a-Aggregation_Options-Lecture.srt. Closes #402

Habíamos usado "zip codes":

./Week5_Aggregation/Spanish_es/08a-Using_$sum-Lecture.srt:297:Eso es el "zip code"
./Week5_Aggregation/Spanish_es/10a-Using_$addToSet-Lecture.srt:233:de "zip codes" --
./Week5_Aggregation/Spanish_es/10a-Using_$addToSet-Lecture.srt:237:la población por "zip code" --
./Week5_Aggregation/Spanish_es/10a-Using_$addToSet-Lecture.srt:281:tres "zip codes" diferentes,
./Week5_Aggregation/Spanish_es/10a-Using_$addToSet-Lecture.srt:303:es decir, "zip codes" --
./Week5_Aggregation/Spanish_es/09a-Using_$avg-Lecture.srt:154:de datos de "zip codes" de Estados Unidos,