The c++ contextual link did not work.

This reverts commit aa26bdab.

The c++ contextual link did not work.

Include the PHP section for the spansih reference books, then added the
"Manual de PHP".

Python para principiantes
http://www.librosweb.es/python/

Adding a spanish Git resource on http://librosweb.es.

both catergories are the same. I also put the title of Lisa Watts's book in spanish (as the translations version has)

Res: http://cran.r-project.org/other-docs.html