Adding contributor into README.
Proofread and edited chapter 1. Also fixed some typos.
Removing 'Overwriting Variables' from the 'In This Chapter' list.
Algunas palabras sin traducir.
id-chapter1. fix typo
update readme: use glossary style for english/programming term
id-chapter3
Secciones: Aprovechar print() al Máximo; Ejecución de Muestra de Chistes; El Código Fuente de Chistes; Cómo Funciona el Código.
Merge branch 'master' of https://github.com/asweigart/inventwithpython3rded

Conflicts:
	translations/id/text/chapter1.txt
Merge pull request #24 from map0logo/master

Algunas palabras sin traducir.
Merge pull request #25 from bbn-bernard/master

id-chapter3
Suggested typo corrections in "chapter4.txt"
Added new words to "glosario.txt"
Translated "es_chapter4.figures"->"capítulo4.figuras"
Translated "es_chapter4.txt"->"capítulo4.txt"

Note: The links to code files (e.g. http://invpy.com/adivinaElNúmero.py) may need to be corrected.
Just renamed "es_chapter4.txt" to "capítulo4.txt" (I forgot to do it before the previous commit)
Merge https://github.com/asweigart/inventwithpython3rded
Modified slightly the text in script "adivinaElNúmero.py"
Merge pull request #26 from alfredocarella/master

Translated "es_chapter4.txt"->"capítulo4.txt"
id. update glossary