Completed transltation of '02-Indexes' into Spanish, Fix #59.
Translated
Minor edits for #59.
Merge pull request #274 from puentesarrin/issue-59

Completed translation of '02-Indexes' into Spanish, Fix #59.
Updated after feedback
Merge pull request #275 from jcarlosgarcia/hw4-3

Completed translation of "28-HW 4.3" parts a and b. Resolves #270
Copied week5 files to Spanish directory before to translation.