Made very small corrections to "hola.py"
Made 3 very small corrections to the original file "chapter3.py"
Translated "es_chapter3.py"->"capítulo3.py"
Added a couple of words to "glosario.txt"
Merge pull request #20 from alfredocarella/master

Translated "es_chapter3.py"->"capítulo3.py", and some extra details: