Partial traslation of chapter2.txt (up to line 34)
Updated capítulo2.txt to last version
Partial traslation of chapter3.txt (up to line 26)
Updated capítulo3.txt to last version
Partial traslation of chapter4.txt (up to line 193)
Merge commit
Merge pull request #66 from alfredocarella/master

Updated capítulo2.txt and capítulo3.txt to match final English version.
Merge branch 'master' of https://github.com/asweigart/inventwithpython3rded